katmansilla44766 katmansilla44766

15-08-2019
Mathematics

contestada

4x^2 - x - 7 when x = -2

Respuesta :

yungsherman yungsherman

15-08-2019

Answer:

11

Step-by-step explanation:

Lets plug in -2 for x

Remember that a negative number times a negative number is positive, so (-2)² is positive 4. Also remember subtracting by a negative means you are adding the number.

[tex]4x^2 - x - 7 \\\\4(-2)^2 - (-2) - 7 \\\\4(4) + 2-7\\\\16 -5\\\\11[/tex]

So the answer is 11

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