Question

Write each sum as a product of the GCF of the two numbers : 75 and 90

Answer 1

find factors and group common ones
75=3*5*5
90=2*3*3*5
common gropu is 3*5=15

75=15*5
90=15*6
ab+ac=a(b+c)
a is GCF
75+90
5(15)+5(6)=5(15+6)