Question

How do you simplify this expression?

9 • (7 –4)2 + 9

Answer 1

(3)^2.(3)^2+3^2
=3^4+3^2

Answer 2

3^2(3^2+1)=9(9+1)=90

Answer 3

9 • (7 –4)2 + 9
9 • (3)2 + 9
9 • 6 + 9
36 + 9
45

.....................wait, is the 2 an exponent. If so then it is:

9 • (7 –4)2 + 9
9 • (3)2 + 9
9 • 9 + 9
81 +9
90