hali12
PLEAS HELP
Elavuate k(2q^2 + 3q) for k(x) =8x + 7q



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nphuongsun93
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just substitute 2q^2 + 3q as x in k(x) = 8x + 7q

hali12
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I still dont get it, i wasnt taught this

tcarroll010
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2q^2 + 3q put it where the x goes.

hali12
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k(2q^2 + 3q) for k( 2q^+3q) =8x + 7q?

nphuongsun93
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8 x + 7q
8(2q^2+3q) + 7q
~

tcarroll010
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Do you see 8x? It's the same as 8(x). Put that expression where the x goes.

hali12
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Do what?

tcarroll010
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Do the substitution. Put the expression where you see x.