Question

(8x^2+5)-(3x^2-x+7)

Answer 1

What's the plan? Combine like terms. Let's see your first attempt.

Answer 2

5x^2 - 2 + x
I'm not entirely sure about the x part, but the rest is correct. You have to "distribute" the subtraction sign to all the numbers on the right of it to solve it.

Answer 3

8 - 3 = 5 Right - That's the x^2 like terms
0 - (-1) = 0 + 1 = 1 - You just missed the x like terms
5 - 7 = -2 Right - That's the constant terms.

You were VERY close.