How do you simplify $2 + 3 times 5^2 - 7$ ?

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Answer 1 · 2016-02-27T14:12:59

Use the order of operations:
1. exponentiation
2. multiplication
3. addition and subtraction (left to right)

$2+3xxcolor(blue)(5^2)-7$

$=2+color(blue)(3xx25)-7$

$=color(blue)(2+75)-7$

$=color(blue)(77-7)$

$=70$

How do you simplify 2 + 3 times 5^2 - 72 + 3 times 5^2 - 7?