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Anna007 [38]
3 years ago
8

If Q(x) = 4x^2 + 5x -7, find Q(-1)

Mathematics
2 answers:
Yuliya22 [10]3 years ago
8 0

Answer:   -8

<u>Step-by-step explanation:</u>

Q(x) =  4x²  +  5x  - 7

Q(-1) = 4(-1)² + 5(-1) - 7

      =   4(1)   +  -5    -7

      =     4       - 5    -7

      =  -8

Brilliant_brown [7]3 years ago
4 0
<h3>Answer:   -8</h3>

===================================================

Work Shown:

Q(x) = 4x^2 + 5x - 7

Q(-1) = 4(-1)^2 + 5(-1) - 7 .... replace every x with -1; use PEMDAS

Q(-1) = 4(1) + 5(-1) - 7

Q(-1) = 4 - 5 - 7

Q(-1) = -1 - 7

Q(-1) = -8

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