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If y = 8 - 5x +4x^2, what is the value of y when x=-2?
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3 votes
If y = 8 - 5x +4x^2, what is the value of y when x=-2?

User Ben Martin
by
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2 Answers

2 votes

Answer: y=34

Explanation:

input -2 into the equation and solve for y.

y= 8 - 5(-2) + 4(-2)^2

y = 8 + 10 + 4 * 4

y = 8 + 10 + 16

y= 18 + 16

y = 34

User Ramil
by
4.5k points
5 votes

Answer:

34

Explanation:

We simply plug in x = -2 into the equation so when x = -2:

y = 8 - 5 * (-2) + 4 * (-2)² = 8 + 10 + 16 = 34.

User ChoclateLove
by
4.8k points
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