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Can someone help me in this one cuz it’s seems difficult to me

Can Someone Help Me In This One Cuz Its Seems Difficult To Me class=

Sagot :

Dspaderidn

Answer:

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Step-by-step explanation:

(i) 16a^2=2√a

Square both sides.

256a^4=4a

Then solve.

a=0,a=1/4

(ii) b^4+7b^2-18=0

Rewrite the equation with u=b^2 and u^2=b^4.

u^2+7u-18=0

Solve.

u=2, u=-9

Substitute back u=b^2. Solve for b.

b=√2, b=-√2, b=3i, b=-3i

-hope it helps?

(I'm still new to this subject so I might have it incorrect)

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