r4sti
r4sti
27-09-2016
Mathematics
contestada
Solve for x. 2x^2/x^4=8
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Аноним
Аноним
27-09-2016
2x²/x⁴=8
2(x²/x⁴)=8
2(1/x²)=8
2=8x²
x²=2/8
x²=1/4
x=⁺₋√(1/4)
x=⁺₋1/2
Answer: we have two solutions: -1/2 and 1/2
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apologiabiology
apologiabiology
27-09-2016
the x^2 cancels
[tex] \frac{2x^2}{x^4} =8[/tex]
[tex] \frac{2}{x^2} =8[/tex]
times both sides by x^2
2=8x^2
divide both sidesby 8
1/4=x^2
sqrt both sides
+/-1/2=x
x=-1/2 and 1/2
Answer Link
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