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Answer :
To find the value of the expression [tex]\(-3b^2 + 25\)[/tex] when [tex]\(b = 7\)[/tex], follow these steps:
1. Substitute the value of [tex]\(b\)[/tex] into the expression:
[tex]\[
-3(7)^2 + 25
\][/tex]
2. Calculate the square of 7:
[tex]\[
7^2 = 49
\][/tex]
3. Multiply the squared value by -3:
[tex]\[
-3 \times 49 = -147
\][/tex]
4. Add 25 to the result:
[tex]\[
-147 + 25 = -122
\][/tex]
So, the value of the expression [tex]\(-3b^2 + 25\)[/tex] when [tex]\(b = 7\)[/tex] is [tex]\(-122\)[/tex].
The correct answer is A) -122.
1. Substitute the value of [tex]\(b\)[/tex] into the expression:
[tex]\[
-3(7)^2 + 25
\][/tex]
2. Calculate the square of 7:
[tex]\[
7^2 = 49
\][/tex]
3. Multiply the squared value by -3:
[tex]\[
-3 \times 49 = -147
\][/tex]
4. Add 25 to the result:
[tex]\[
-147 + 25 = -122
\][/tex]
So, the value of the expression [tex]\(-3b^2 + 25\)[/tex] when [tex]\(b = 7\)[/tex] is [tex]\(-122\)[/tex].
The correct answer is A) -122.
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