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OpenStudy (anonymous):
Given f(x)=3x^2-10x, find all values for which f(x)=8
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OpenStudy (anonymous):
Subtract 8 and factor or use the quadratic formula
OpenStudy (anonymous):
\[3x^2-10x = 8\]
OpenStudy (anonymous):
\[3x^2-10x-8 =0\]
OpenStudy (anonymous):
i was questioning whether to set the problem to equal 8 and go from there or not. Thanks
OpenStudy (anonymous):
now u can factorise
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OpenStudy (anonymous):
Yeah f(x)=y so treat it as a variable and just substitute the 8 in for it
OpenStudy (anonymous):
x=6, x=4
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