Question

(x-a)(x+b)=?? prove pls​

Answer 1

Answer:

$x(x + b) - a(x + b)$

Answer 2

Answer:

(x-a)(x+b)

• x(x+b)-a(x+b)
• x^2+bx-ax-ab
• x^2+x(b-a)-ab
• hence (x-a)(x+b)=x^2+x(b-a)-ab