Question

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

Answer 1

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:

$=201$

Answer 2

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