Question

expansion formulae expand it

(a+2)(a-1)​

Answer 1

Step-by-step explanation:

By using this formula

(n+a) (x-b) = x^2+ (a-b)x -ab

a^2 + (2-1)a -2*1

a^2 + a -2

Answer 2

Answer:

$\sf{ = > {a}^{2} + (2 + ( - 1))} + 2 \times - 1$