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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

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
asked 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

asked
User Avinash Mishra
by
7.8k points

2 Answers

3 votes
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.
answered
User Miguel Costa
by
7.9k points
3 votes
-3 × 39 + 25
-147 + 25
=
-122

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


answered
User Scharron
by
8.5k points
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