Question

What is 11x to the second power minus 3 x times y to the third power if x = 3 and y = 2?

Answer 1

27

Explanation:

`11x^(2) -3x*y^3`

Now we replace the variables by the numbers given.

`11(3)^2-3(3)*2^3`

We use PEMDAS, (parentheses, exponents, multiplication, division, addition, subtraction)

First we solve the exponents.

`11(9) - 3(3) * 8`

Next the multiplication, left to right

`99-9*8`

`99-72`

`27`