Question

10. (x + 5) (x-5) - 4(x + 5). please solve answer is (x+5) (x+1)​

Answer 1

Answer:

(x+5)(x-5)-4(x+5)

=x^2-4x-45

Answer 2

(x+5)(x-5) -4(x+5)

x2 - 5x + 5x - 25 - 4x - 20

x2 - 4x - 45

using quadratic formula:

D = b2 - 4ac

= (-4)^2 - 4(1)(-5)

= 16 + 20

= 36

but the answer is coming (x-5 ) and (x+1)

check the question