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Given that y=x^2+2x-3
When x is -3 what is y?
Is the ans 0?

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

  • Maths -

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

    if x=1, then y=0, you are correct:
    Does this make sense?

    Hope this helps!! :-)

  • Maths -

    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.

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