Question

(a + 1)(a + 2) = 0

Answer 1

a=−1,−2

Answer 2

I believe we have to show the work also @220287

Answer 3

Start with simplifying both sides of the equation:
\(a^2+3a+2=0\)
and than factor left side of equation.
\((a+1)(a+2)=0\)

Answer 4

From there set factors to \(\color{lime}{0}\)
which would be \(a+1=0\) or \( a+2=0\)

Answer 5

And as @220287 said the answer, it would be correct, \(a=−1~ or~ a=−2.\) (: