3 years ago

What is the error in the student work below?

Mathematics

2 answers:

sp2606 [1]3 years ago

8 0

The negative 16 in the second line should be positive 16.

See attached picture:

ivann1987 [24]3 years ago

5 0

Answer:

This is +16x not minus 16x as shown in the problem

Step-by-step explanation:

4x^3 + 4x^2 -8x-(8x^2 -16x+4)

Distribute the minus sign

4x^3 + 4x^2 -8x-8x^2 +16x-4

The error is here This is +16x not minus 16x as shown in the problem

4x^3 -4x^2 +8x-4

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