RoseG012
RoseG012 RoseG012
  • 23-12-2018
  • Mathematics
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How much less than 3x^2−7x+9 is 2x^2+4x−8? What is the value of the result when x=2?

^=power

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Аноним Аноним
  • 23-12-2018

Answer:

1

Step-by-step explanation:

well 3x2^2-7x2+9 = 7

well 2x2^2+4x2−8 = 8

8-7 =1

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genderfluidnarwhals genderfluidnarwhals
  • 12-01-2020

THE ANSWER IS -1

first, subtract the polynomials:

3x^2-7x+9-(2x^2+4x-8)

Remove parentheses

3x^2-7x-2x^2-4x+8

Combine like terms

The new polynomial is x^2-11x+17 (if you do RSM this is actually the answer to one of the fields on the HW)

Substitute for when x=2

2^2-11*2+17

Compute

4-22+17

4-5

-1

I know for a fact that the answer is -1, I entered this in myself and it was correct.

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