thisisarri
Solve x2 − 3x = 28. HELP ME (:



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modphysnoob
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x^2 3x=28
x^23x28=0
factor
(x )(x )=0
think of two number that add up to 3 and multiply to 28

modphysnoob
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what two number multiples to be 28?

thisisarri
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ok, one second. @modphysnoob

thisisarri
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7, and 4

thisisarri
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@modphysnoob

nader1
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(x7)(x+4)=0

nader1
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good job

modphysnoob
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yep, 7+4=3
7*4=28

thisisarri
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haha thanks @nader1

modphysnoob
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so you'd get here
(x7)(x+4)=0
from here , we can deduce that
x=7,4

thisisarri
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thanks doe