Question

a^2 x^2+(a^2- b^2) x-b^2=0​

Answer 1

A2 X2 + (a2 - b2) x-b2 = 0

taking a2 common

X2 +( 1-b2) x-b2 = 0

X2 + x- (b2 - b2 x - b4 )

x2 + x- b2 (1-x-b2)

all of them with cancel