if y=x^2+2x-3, what is y when x=-4

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if y=x^2+2x-3, what is y when x=-4?

Guest Feb 12, 2015

+118723

+5

Best Answer

Thanks Quentin, but you need to add some working or the asker cannot learn anything.

if y=x^2+2x-3, what is y when x=-4?

$$\\y=(-4)^2+2*(-4)-3\\
y=16+-8-3\\
y=16-8-3\\
y=5$$

Melody Feb 13, 2015

Melody · Answer 1 · 2015-02-13T01:31:21

Thanks Quentin, but you need to add some working or the asker cannot learn anything.

if y=x^2+2x-3, what is y when x=-4?

$$\\y=(-4)^2+2*(-4)-3\\
y=16+-8-3\\
y=16-8-3\\
y=5$$

Quentin · Answer 2 · 2015-02-12T04:57:39

After simplifying, y=5