Question

How do you evaluate the following expression when x = 3 and y = 4: for `3x^2`?

Answer 1

If `x=3` then `3x^2 = 27`

Explanation:

Based on `color(red)x=color(blue)3`, substitute the value `color(blue)3` for `color(red)x`
in the expression `3color(red)x^2`

`3color(red)x^2 = 3*color(blue)3^2 = 3*9 = 27`