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Evaluating algebraic expressions
1) Evaluate x(2x² – 4) at x = -2
-8
-7
-9
4
1/10
Solution
Answer:
-8
Explanation:
x(2x² – 4)
Sub x = -2
We get
= -2(2(-2)² - 4)
= -2(2(4) - 4)
= -2(8 - 4)
= -2(4)
= -8
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