Which point is an x-intercept of the quadratic function f(x)=(x+6)(x-3)?
f(x)=(x+6)(x-3)
Change the function to an equation:
y = (x + 6)(x - 3)
When y = 0:
x + 6 = y
x + 6 = 0
x = 0 - 6
x = -6
x - 3 = y
x - 3 = 0
x = 0 + 3
x = 3