Question

Use chunking and u-sustitution to find the zeros of f(x)=(x^4)+5(x^2)-36.

Answer 1

(x^4)+5(x^2)-36
(x^2)^2+5(x^2)-36
u=x^2

u^2+5u-36
(u-4)(u+3)=0
u=4 u=-3
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x^2=4
x=2,-2
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x^2=-3
np