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Black_prince [1.1K]
3 years ago
15

Evaluate this exponential expression. 3 • (5 + 4)2 – 42 =

Mathematics
2 answers:
Alecsey [184]3 years ago
4 0

Answer: =201

Step-by-step explanation:

Given the exponential expression 3(5 + 4)^2 - 42, it is necessary to follow these steps to evaluate it:

Make he addition inside the parentheses:

3(5 + 4)^2 - 42 =3(9)^2 - 42

The exponent 2 indicates that you must multiply 9 by itself twice, then:

=3(9*9) - 42=3(81)-42

Now you need to multoply 3 by 81:

=243-42

And finally, you must make the subtraction indicated. Then:

=201

REY [17]3 years ago
3 0

Answer:

12

Step-by-step explanation:

First,you need to do the cacul of the parenthese,second,you solve by multiply and after that,by substract the answer by 42.

The answer will be 12

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