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natima [27]
3 years ago
12

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
2 answers:
natali 33 [55]3 years ago
8 0
We first need to substitute in the value of b, which is 7. 

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

The final result is, B) -122.
mr_godi [17]3 years ago
5 0
-3 × 39 + 25
-147 + 25 
=
-122

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


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