Given that y=x^2+2x-3

Question

When x is -3 what is y?
Is the ans 0?

When x is 1 what is y?
Is the ans 0?

Answer 1

if x=-3, then y=-3, not zero:
y=-3^2-6-3
y=6-6-3
y=-3
Does this make sense?

if x=1, then y=0, you are correct:
y=1^2+2-3
y=1+2-3
y=3-3
y=0
Does this make sense?

Hope this helps!! :-)

Answer 2

Sally has made a mistake. (-3)^2 = 9 not 6.

y=-3^2-6-3 = 9 - 6 - 3 = 0

The second value solution is correct.

I hope this helps a little more. Thanks for asking.