Hi I just wanna make sure if therr's a difference of these two.

Question

-9² and (-9)²

Answer 1

-9^2 = -81

(-9)^2 = +81

there's a 162 difference between them

PEMDAS is the order of arithmetic operations

P = parentheses first

E= exponents 2nd

Multiplication and Subtraction 3rd and last

so -9^2 = -(9^2) = -(81) = -81

but

(-9)^2 = -9 times -9 = +81

a "huge" difference, depending on the units involved

if the units are micro milimeters, almost no difference, but still a difference

if the units are yards or meters, a "huge" difference.

if you're aiming at a target on a gun range