Question

The function y=-x^2+2x-3 has a value of

Answer 1

(-3,0) (1,0) because x=-3 x=1

Answer 2

Find the value of x by factoring.

What multiplies to -3 and adds to 2?

$y=(x+3)(x-1)$

Meaning that the x-intercepts are at (-3,0) and (1,0).

Hope this helps.

頑張って!