Question

Janelle expanded the expression as shown below.

What errors did she make? Select three options.
The first term should be positive.
The second term should be positive.
She did not distribute the properly.
She added to instead of multiplying by .
She did not simplify the expression completely.

Answer 1

A, C, D

Explanation:

A (The first term should be positive), C (She did not distribute the -4 properly) D ( She added 2/7 to -4 instead of multiplying 2/7 by -4) CORRECT ANSWER ON EDGE 2021!

Answer 2

She added to instead of multiplying by .

The first term should be positive

She did not distribute the properly.

Explanation:

Janelle's calculation:

-4(-3x + 2/7)

= -12x - 3 5/7

Correct calculation:

-4(-3x + 2/7)

= 12x - 8/7

She added to instead of multiplying by

The first term should be positive

She did not distribute the properly.