Question

Daniel expanded the expression as shown what errors did he make
-2(-8x-4y+3/4)=10x-8y-1 1/4

Answer 1

Explanation:

-2(-8x -4y + 3/4)

=> 16x + 8y - 3/2

So what mistakes he made were

1) Daniel added instead of multiplying

• Daniel did -2 + -8x instead of -2(-8x)

2) When multiplying two negative signs equal a positive

• -2 * -4y = 8y not -8y

3) For the last number, Daniel added instead of multiplying

• -2 * 3/4 = 3/2 instead he did 2 + 3/4

Answer 2

It’s meant to be +8y not (-) also the last part with the fraction is incorrect.