Question

x²+16x=225 please answer quick

Answer 1

X^2 + 25x - 9x - 225 = 0
X(x+25) - 9(x+25) = 0
(x+25)(x-9) = 0
X = 9, - 25

Answer 2

x2 +16x- 225 =0
By quadratic formula
d = b2 - 4ac
b = 16, a= 1, c=-225
=( 16)2-4×1×-225
d = 1156

By quadratic formula
x= - 25, 9.