Question

Rewrite the sum product of the gcf 9+15 and a new sum

Answer 1

GCF(9; 15) = 3

9 = 3 · 3
15 = 3 · 5

9 + 15 = 3 · 3 + 3 · 5 = 3·(3 + 5)

Used distributive property: a(b + c) = ab + ac