Question

check whether the following are quadratic equations (x-2)(x+5)=(x-3)(x+4)+x^2​

Answer 1

Answer:

No

Step-by-step explanation:

(x+5)=(x-3)(x+4)+x²

x+5 = x(x+4)-3(x+4)+x²

x+5 = x²+4x -3x+12 +x²

x+5 = 2x² +x + 12

2x² + 12 = x+5 -x

2x² = 5-12= -7

x²= -7/2

x = √-3.5