No zero answer

Algebra Level 1

Solve for positive value of x x :

x = 2 x 2 . x = 2x^2.


The answer is 0.5.

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Jade Mijares by Jade Mijares , 30, Philippines

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3 solutions

x = 2 x 2 2 x 2 − x = 0 x ( 2 x − 1 ) = 0 → x = 0 or x = 1 2 x=2x^2\\2x^2-x=0\\x(2x-1)=0\rightarrow x=0 \text{ or } x=\frac{1}{2} As the question asks for the positive solution,so answer is 1 2 \boxed{\dfrac{1}{2}}

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Jade Mijares
Nov 2, 2015

x = 2 x 2 x = 2x^2 1 = 2 x 1 = 2x 0.5 = x \boxed{0.5 = x}

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Did the same way

omar el amrani - 5 years, 6 months ago
Francis Brasil
Nov 28, 2015

As x=2x^2 => x - 2x^2=0=> x(1-2x)=0, So Or x=0 Or 1-2x = 0 => 1= 2x => x= 0.5

0 in this question is not a correct answer because it isn't positive.

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