Question

Alexandra is trying to factorise fully15y + 30. Rebecca says the answer is 3(5y + 10) Victoria says the answer is 5(3y + 6) Alexandra says both Rebecca and Victoria are incorrect, why?​

Answer 1

because: 3(5y + 10)=15y+30 (Distributive property between addition and multiplication )

the same we have 5(3y + 6)=15y+30

Explanation:

Answer 2

Explanation:

They are not wrong exactly. Their answers are just incomplete. They did not take the factoring process to it's end.

Victoria could pull out another three.

Rebecca could pull out another five.

The answer is 15(y + 2)