Question

Describe the error then simplify the expression correctly.

-5(3+6)=-15+30
=15

Answer 1

Answer: 30 should be negative

Explanation:

when having an equation like that, you must multiply -5 by 3, which equals to -15, then multiply-5 by 6 which then equals to -30. The correct equation should be -5(3+6)= -15+-30= -45

I think this should be correct, hope this helps!

Answer 2

a) The negative was not distributed to the 6

b) -45

Explanation:

This simplification uses the distributive property. This is when a factor outside of parentheses is multiplied by the factors within the parentheses. When using this property, if the factor outside the parentheses is negative, then that negative must be distributed to both factors within the parentheses.

• The correct way to simplify the expression is as follows:

-5(3+6)

• Multiply -5*3 and -5*6

-15 + -30

• Rewrite this using subtraction

-15-30

• Subtract

-45