Question

Which two points satisfy y = -x2 + 2x + 4 and x + y = 4?

Answer 1

`y=-x^2+2x+4`

`x+y=4`

`y=4-x`

`4-x=-x^2+2x+4`

`x^2-3x=0`

`x(x-3)=0`
x=0 or x =3

for x = 0 y = 4
for x = 3 y = 1