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Algebra Help! Please School is sooon!!!?

Please I dont understand this?

Solve the following problems.

Find the values for which is undefined

2y-6


2y^2+6y+2

Find the numerical value of

2x-3


x^2-4x+1

when x=-4

Find the numerical value of

x^2+6


x^2-3x-10

when x=-4

Answers (2)

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don't know about the first one, but for the second two just plug in -4 where ever you see an x. so the second is:

2(-4)-3


(-4)^2-4(-4)+1

then solve