Question
Download Solution PDFযদি a, b, c অ-শূন্য বাস্তব সংখ্যা হয়, যেখানে a + b + c = 0, তাহলে ax2 + bx + c = 0 সমীকরণের মূলগুলি কী কী?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFঅনুসৃত সূত্র:
(a + b)2 = a2 + 2ab + b2
(a - b)2 = a2 - 2ab + b2
দ্বিঘাত সমীকরণের সমাধান ax2 + bx + c = 0 দ্বারা দেওয়া হয়েছে
\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)
গণনা:
প্রদত্ত রয়েছে
a + b + c = 0
b = - (a + c) ------(1)
ax2 + bx + c = 0 দ্বিঘাত সমীকরণের মূল হল
\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)
\(x = {(a+c) \pm \sqrt{[-(a+c)]^2-4ac} \over 2a}\)
\(x = {(a+c) \pm \sqrt{a^2+2ac+c^2-4ac} \over 2a}\)
\(x = {(a+c) \pm \sqrt{a^2-2ac+c^2} \over 2a}\)
\(x = {(a+c) \pm \sqrt{(a-c)^2} \over 2a}\)
\(x = {(a+c) \pm {(a-c)} \over 2a}\)
বিকল্পভাবে ধনাত্মক এবং ঋণাত্মক চিহ্নগুলি বিবেচনা করে,
\(x = {(a+c) +{(a-c)} \over 2a}\) এবং \(x = {(a+c) +{(a-c)} \over 2a}\)
\(x = \frac{{2a}}{ 2a}\) এবং \(x = \frac{{2c}}{ 2a}\)
\(x = 1, \ \ x = \frac{c}{a}\)
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