4 years ago

Subtract 5x2 - 5x+ 3 - (2x2 +7 x - 4)

Mathematics

2 answers:

QveST [7]4 years ago

5 0

3x2 + 2x - 1

hope it helps

allsm [11]4 years ago

4 0

3x^2-12x+7

Step-by-step explanation:

In this sort of question you collect like terms. The first thing I recommend you do is open up the brackets by multiplying everything inside the bracket by -1.

This will chance the (2x^2+7x-4) to -2x^2-7x+4.

Then you can collect like terms

5x^2 - 2x^2 = 3x^2

-5x-7x = -12x

3 - -4 =7

overall you get 3x^2-12x+7 which is option A

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