Given: f(x)=x^4-8x^2+5 find all roots to the nearest 0.001

We let x square =y

so x to the power 4 = y square

and we get

To find the zroes, we need to set f(y) to 0 and solve for y .

Now we use completing the square method

Now we do the back substitution.

and

we know that

applying the law of sines

°

so

∠j=18°

∠k=29°

∠l=180-(18+29)=133°

the answer part a) is

the measure of angle k is  ≈29°

part b)  the measure of angle k could also be

(180-29)=151°

so

∠j=18°

∠k=151°

∠l=180-(18+151)=11°

the answer part b) is

the measure of angle k could also be 151°

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x^6

step-by-step explanation:

this is correct because:

x-6=0

0*x=0

so

x^6