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4 votes
Evaluate this exponential expression.
4. (2 + 5)2 - 52 =

Evaluate this exponential expression. 4. (2 + 5)2 - 52 =-example-1
User Matt Hyde
by
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2 Answers

0 votes

Answer:

C. 171

Explanation:


4\cdot (2+5)^2-5^2\\\\Follow\:the\:PEMDAS\:order\:of\:operations\\\\\mathrm{Calculate\:within\:parentheses}\:\left(2+5\right)\::\quad 7\\=4\cdot \:7^2-5^2\\\\\mathrm{Calculate\:exponents}\:7^2\::\quad 49\\=4\cdot \:49-5^2\\\\\mathrm{Calculate\:exponents}\:5^2\::\quad 25\\=4\cdot \:49-25\\\\\mathrm{Multiply\:and\:divide\:\left(left\:to\:right\right)}\:4\cdot \:49\::\quad 196\\=196-25\\\\\mathrm{Add\:and\:subtract\:\left(left\:to\:right\right)}\:196-25\:\\:\quad 171\\

User Sushil Pandey
by
8.8k points
7 votes

C.171

Explanation:

4×7(2)-25

4×49-25

multiply 4×49=196-25

then subtract 196-25=171

User Rafael Vega
by
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