QuestionDecember 15, 2025

33. True or False. a. The value of -x3-4x2+7 is -2 when x=-3

33. True or False. a. The value of -x3-4x2+7 is -2 when x=-3
33. True or False.
a. The value of -x3-4x2+7 is -2 when x=-3

Solution
4.3(110 votes)

Answer

True Explanation 1. Substitute x = -3 into the expression Replace x in -x^3 - 4x^2 + 7 with -3. 2. Calculate each term -(-3)^3 = -(-27) = 27, -4(-3)^2 = -4(9) = -36, +7. 3. Add results 27 - 36 + 7 = -2.

Explanation

1. Substitute $x = -3$ into the expression<br /> Replace $x$ in $-x^3 - 4x^2 + 7$ with $-3$.<br />2. Calculate each term<br /> $-(-3)^3 = -(-27) = 27$, $-4(-3)^2 = -4(9) = -36$, $+7$.<br />3. Add results<br /> $27 - 36 + 7 = -2$.
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