I'm having trouble with this question and I need some help with it. thanks

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(3 -2n^2 + 4n) - (7n +8n^2 -8)

Guest Sep 6, 2014

+118667

+5

Best Answer

Let's just look at this bit.

- (7n +8n^2 -8)

This is the same as (there is an invisable 1 between the - sign and the bracket.)

- 1(7n +8n^2 -8)

can you expand it now? you have to multiply everything inside the bracket by -1

Melody Sep 6, 2014

Melody · Answer 1 · 2014-09-06T07:40:37

Let's just look at this bit.

- (7n +8n^2 -8)

This is the same as (there is an invisable 1 between the - sign and the bracket.)

- 1(7n +8n^2 -8)

can you expand it now? you have to multiply everything inside the bracket by -1