Question

35. Check whether the following are quadratic equations :(2x+5)^2=x(x-4)
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Answer 1

Answer:

Step-by-step explanation:

(2x+5)^2 = x(x+4)

2x^2+ 2(2x) (5) + (5)^2 = $x^{2}$ + 4x

4$x^{2}$ + 20x + 25 - $x^{2}$ - 4x = 0

$3x^{2}$ + 16x = 25

hence it is an quadratic equation

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