Question

find the x-intercepts and the y-intercept for the parabola whose equation is given. if an intercept is an irrational number, round it to the nearest tenth.

y=-x^2+9x-20

Answer 1

for the x intercept, set y=0
-(x^2-9x+20)=0
(x-5)(x-4) =0
x=5, x=4
x-intercepts are (5,0) and (4,0)

for the y intercept set x=0
y=-20
y intercept is (0,-20)