Question

What is thr answer of (a-b) (a+2b)​

Answer 1

Explanation:

Use FOIL method

F -> First

O Outside

I inside

L Last

(a - b)(a + 2b)= a*a + a *2b + (-b)*a + (-b)*2b

= a² + 2ab - ab - 2b²

Combine like terms

= a² + ab - 2b²