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1-x-2x^2\geq 0

Solve the inequality -1x-2x^2+1%0

Answer

$0.5\geq x\geq -1$

Step-by-step explanation

Problem

$1-x-2x^2\geq 0$
1

To find the roots of a polynomial of the form $ax^2+bx+c$ we use the quadratic formula, where $a=-2$, $b=-1$ and $c=1$

$x =\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

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Answer

$0.5\geq x\geq -1$