حل أسئلة تحقق من فهمك

حل المعادلات التربيعية باستعمال القانون العام

تحقق من فهمك

١أ) ٢س٢ +٩س = ١٨

س = right to left fraction numerator negative ب space plus-or-minus space square root of left parenthesis ب right parenthesis to the power of ٢ space minus space ٤ أ space جـ end root over denominator ٢ أ end

س = right to left fraction numerator negative ٩ space plus-or-minus square root of left parenthesis ٩ right parenthesis to the power of ٢ space minus ٤ space cross times space ٢ space cross times negative ١٨ end root over denominator ٢ cross times ٢ end

س = right to left fraction numerator negative ٩ space plus-or-minus square root of ٢٢٥ over denominator ٢ cross times ٢ end fr

س = right to left fraction numerator negative ٩ space plus space ١٥ over denominator ٢ cross times ٢ end fraction space equals space ٣

س = right to left fraction numerator negative ٩ space minus space ١٥ over denominator ٢ cross times ٢ end fraction =

١ب) ٤س٢ -٢٤س + ٣٥ = ٠

س = right to left fraction numerator negative ب space plus-or-minus space square root of left parenthesis ب right parenthesis to the power of ٢ space minus space ٤ أ space جـ end root over denominator ٢ أ end

س = right to left fraction numerator ٢٤ space plus-or-minus square root of left parenthesis negative ٢٤ right parenthesis to the power of ٢ space minus ٤ space cross times space ٤ space cross times ٣٥ end root over denominator ٢ cross times ٤ e

س = right to left fraction numerator ٢٤ space plus-or-minus square root of ١٦ over denominator ٨ end fra

س = right to left fraction numerator ٢٤ space plus space ٤ over denominator ٨ end fraction space equals space ٧ o

س = right to left fraction numerator ٢٤ space minus space ٤ over denominator ٨ end fraction space equals space ٥ o

تحقق من فهمك

٢) ٣س٢ -٢س - ٩ = ٠

س = right to left fraction numerator negative ب space plus-or-minus space square root of left parenthesis ب right parenthesis to the power of ٢ space minus space ٤ أ space جـ end root over denominator ٢ أ end

س = right to left fraction numerator ٢ plus-or-minus square root of left parenthesis ٢ right parenthesis to the power of ٢ space minus ٤ space cross times space ٣ cross times negative ٩ end root over denominator ٢ cross times ٣ end

س = right to left fraction numerator ٢ plus-or-minus square root of ١١٢ over denominator ٦ end fraction equals fraction numerator ٢ space plus space ٢.١٠ over denominator ٦ en٢,١

س = right to left fraction numerator ٢ plus-or-minus square root of ١١٢ over denominator ٦ end fraction equals fraction numerator ٢ space minus space ٢.١٠ over denominator ٦ en = -١,٤

تحقق من فهمك

٣أ) ٢س٢ - ١٧س + ٨ = ٠

س = right to left fraction numerator negative ب space plus-or-minus space square root of left parenthesis ب right parenthesis to the power of ٢ space minus space ٤ أ space جـ end root over denominator ٢ أ end

س = right to left fraction numerator ١٧ space plus-or-minus square root of left parenthesis negative ١٧ right parenthesis to the power of ٢ space minus ٤ space cross times space ٢ space cross times ٨ end root over denominator ٢ cross times ٢ en

س = right to left fraction numerator ١٧ space plus-or-minus square root of ٢٢٥ over denominator ٤ end fr

س = right to left fraction numerator ١٧ space plus space ١٥ over denominator ٤ end fra = ٨

س = right to left fraction numerator ١٧ space minus space ١٥ over denominator ٤ end fraction space equals space ١

٣ب) ٤س٢ -٤س - ١١ = ٠

س = right to left fraction numerator negative ب space plus-or-minus space square root of left parenthesis ب right parenthesis to the power of ٢ space minus space ٤ أ space جـ end root over denominator ٢ أ end

س = right to left fraction numerator ٤ space plus-or-minus square root of left parenthesis ٤ right parenthesis to the power of ٢ space minus ٤ space cross times space ٤ space cross times negative ١١ end root over denominator ٢ cross times ٤ end

س = right to left fraction numerator ٢٤ space plus-or-minus square root of ١٩٢ over denominator ٨ end fr

س = right to left fraction numerator ٤ space plus space square root of ١٩٢ over denominator ٨ end fra٢,٢

س = right to left fraction numerator ٤ space minus space square root of ١٩٢ over denominator ٨ end fra-١,٢

تحقق من فهمك

٤أ) ٢س٢ + ١١س + ١٥ = ٠

أب٢ - ٤أ جـ = (١١)٢ - ٤× ٢ × ١٥ = ١

بما أن المميز موجب إذن يوجد حلان حقيقيان.

٤ب) ٩س٢ -٣٠س + ٢٥ = ٠

أب٢ - ٤أ جـ = (-٣٠)٢ - ٤× ٩ × ٢٥ = ٠

بما أن المميز موجب إذن يوجد حل واحد حقيقي.

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حل اسئلة رياضيات - علوم - عربي وجميع الكتب والمواد الأخرى

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