what is the answer to 3 (4 to the 2nd power - 9 ) + 1 - 2 to the 2nd power

Answer 1

I'm assuming your problem is:

3(4² - 9) + 1 - 2²

PEMDAS

Parentheses first:

Within parentheses, exponents first

4² = 16

16 - 9 = 7

3(7) + 1 - 2²

Exponents next

2² = 4

3(7) + 1 - 4

Multiplication next

3*7 = 21

21 + 1 - 4 = 18