Subtract 7x − 3x2 from 4x + 8x2
-3x
11 - 5x
11
11 - 3x
Subtract terms with same variables
4x - 7x = -3x; 8x2 - (-3x2) = 11x2
What remains when 7x−3x2 is taken away from 4x+8x2?