Which function has real zeros at x = 3 and x = 7?
Of(x) = x2 + 4x – 21
Of(x) = x2 - 4x – 21
O f(x) = x2 – 10x + 21
Of(x) = x2 – 10x – 21

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)