# pre-cal

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find the value(s) of x for which f(x)=g(x).

f(x)=x^4-2x^2,g(x)=2x^2

• pre-cal -

set them equal, and solve for x

x^4-2x^2=2x^2
x^4-4x^2=0
(x^2-2x)(x^2+2x)=0
x^2(x-2)(x+2)=0
and now you have four solutions (two zeroes).

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