moongazer
How do you solve this ? the fastest way possible :)



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moongazer
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38n^2 + 304n  128 = 2n^2

moongazer
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Please help :)

Hero
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1. Add 2n^2 to both sides first

moongazer
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please continue :)

moongazer
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I got 40n^2 + 304n  128 = 0

Hero
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2. Factor out 8

moongazer
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8(5n^2 + 38n  32)

Hero
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You forgot the equal zero part

moongazer
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8(5n^2 + 38n  32) = 0

Hero
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3. Divide both sides by 8

moongazer
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w8 I think I got something wrong

Hero
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32 x 8 = 256
That definitely isn't right

Hero
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Did you figure out what you did wrong yet?

moongazer
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it should be 8(5n^2 + 38n  16) right?

Hero
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equal zero :/

Hero
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You keep forgetting the equal zero

moongazer
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ok, I'll just try to solve it.
I think I am getting confused because I divided 128 by 8 wrongly :)
I'll just ask you if am I stuck with some part :)

moongazer
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8(5n2)(n+8)=0
(5n2)(n+8)=0
n=2/5 , n=8
Is this correct?

moongazer
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Thanks!
I believe it is correct :)

Hero
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It's correct. Good job