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8x^2 - 9 when x = -4
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3 votes
8x^2 - 9 when x = -4

User Dmitry Zinkevich
by
4.1k points

1 Answer

3 votes

Answer:

119

Explanation:

substitute x = - 4 into the expression

8x² - 9

= 8(- 4)² - 9

= 8(16) - 9

= 128 - 9

= 119

User Murray Foxcroft
by
4.0k points
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