Simplify (8j3 − 10j2 − 7) − (6j3 − 10j2 − j + 12). a 2j3 − 20j2 − j + 5 b 2j3 + j − 19 c 2j3 − 20j2 + j − 19 d 2j3 − j + 5

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36