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3 years ago

Which of these is not a factor of 4x2? x2 2.

Mathematics

1 answer:

kenny6666 [7]3 years ago

7 0

29;72828834837271912938462891

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If georgina travels 355 km in 7 hours how far will she travel in 8.5 hours at the same rate

rosijanka [135]

She'll have traveled approximately 431.07 km in 8.5 hours, also, 267.85448 miles per hour.

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3 years ago

Fraction less than 1/2. 3/4 1/6 6/12 4/10 5/8 5/2

N76 [4]

Fractions less than 1/2 are 1/6 & 4/10.
Fractions greater than 1 are 5/4 & 15/12.
Fractions closer to 0 than to 1 are 1/8, 1/4, & 3/10.

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3 years ago

If x^2+1/x^2=3 find the value of x^2/(x^2+1)^2<br> Express answer as a common fraction.<br> Thanks!!

timama [110]

$x^2+\dfrac1{x^2}=3\implies x^4+1=3x^2\implies x^4-3x^2+1=0$

By the quadratic formula,

$x^2=\dfrac{3\pm\sqrt5}2\implies x^2+1=\dfrac{5\pm\sqrt5}2$

Then

$(x^2+1)^2=\dfrac{25\pm10\sqrt5+5}4=\dfrac{15\pm5\sqrt5}2$

$\implies\dfrac{x^2}{(x^2+1)^2}=\dfrac{\frac{3\pm\sqrt5}2}{\frac{15\pm5\sqrt5}2}=\dfrac{3\pm\sqrt5}{15\pm5\sqrt5}$

Multiply numerator and denominator by the denominator's conjugate:

$\dfrac{3\pm\sqrt5}{15\pm5\sqrt5}\cdot\dfrac{15\mp5\sqrt5}{15\mp5\sqrt5}=\dfrac{45\pm15\sqrt5\mp15\sqrt5-25}{15^2-(5\sqrt5)^2}=\dfrac{20}{100}=\dfrac15$

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3 years ago

What is this answer? -1/4-(-3/5)

Anestetic [448]

Answer:

-1/4-(-3/5)=0.35

Step-by-step explanation:

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3 years ago

Read 2 more answers

I need help on this question:

KonstantinChe [14]

Answer:

ehwrjhq

Step-by-step explanation:pwjhreijwhribhbhrtu4i3r3

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3 years ago

Which of these is not a factor of 4x2? x2 2.​

Which of these is not a factor of 4x2? x2 2.