Question

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(a +2)(a - 1)​

Answer 1

Answer:

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Step-by-step explanation:

(a+2)(a-1)

a(a-1)+2(a-1)

a^2-a+2a-2

a^2-a-2

Answer 2

It is known that

(x+a) (x+b)=x²+(a+b)x+ab

(a+2)(a-1)

=(a)²+{2+(-1)}a+(2)×(-1)

=a² +(2-1)a - 2

=a² +a - 2

Hope it helps u