3 years ago

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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