if (x−1) (x+1) +3x+x^2 =ax^2 +bx+c then a=? b=? c=?


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Question Number 5507 by Kasih last updated on 17/May/16

$i f (x - 1) (x + 1) + 3 x + x^{2} = {a x}^{2} + b x + c t h e n a = ? b = ? c = ?$
	Answered by Rasheed Soomro last updated on 17/May/16

	$(x - 1) (x + 1) + 3 x + x^{2} = {a x}^{2} + b x + c$ $x^{2} - 1 + 3 x + x^{2} = {a x}^{2} + b x + c$ $2 x^{2} + 3 x - 1 = {a x}^{2} + b x + c$ $2 x^{2} + 3 x + (- 1) = {a x}^{2} + b x + c$ $a = 2, b = 3, c = - 1$
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