Question

If A=3x^2 + 5x -6 and B= -2x^2 - 6x +7, then A-B equals ?

Answer 1

5x^2 + 11x - 13 = A - B

Explanation:

A - B = ? Substitute 3x^2 + 5x - 6 for A and - (-2x^2 - 6x + 7) for -B:

3x^2 + 5x - 6 - (-2x^2 - 6x + 7). or

3x^2 + 5x - 6 + 2x^2 + 6x - 7, or (after combining like terms):

5x^2 + 11x - 13 = A - B