If the value of b is 7, then what is the value of the expression -3b2 + 25 = ? A. 122 B. –122 C. 172 D. 17

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asked Dec 9, 2017 227k views

3 votes

If the value of b is 7, then what is the value of the expression -3b2 + 25 = ? A. 122 B. –122 C. 172 D. 17

Mathematics
high-school

Avinash Mishra asked

by Avinash Mishra

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2 Answers

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We first need to substitute in the value of b, which is 7.

$-3(7)^2 + 25 \\ \\ -3 * 49 + 25 \\ \\ -147 + 25 \\ \\ -122 \\ \\$

The final result is, B) -122.

Miguel Costa answered Dec 11, 2017

by Miguel Costa

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3 votes

-3 × 39 + 25
-147 + 25
=
-122

So this means your answer would be: B. -122

Scharron answered Dec 16, 2017

by Scharron

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