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Apply the formula: $x^2+bx+c=0$$\to x=\frac{-b\pm \sqrt{b^2-4c}}{2}$, where $b=2$, $c=-4$, $bx=2x$, $x^2+bx=x^2+2x-4$ and $x^2+bx=0=x^2+2x-4=0$
Learn how to solve equations quadratiques problems step by step online.
$x=\frac{-2\pm \sqrt{2^2-4\cdot -4}}{2}$
Learn how to solve equations quadratiques problems step by step online. Solve the quadratic equation x^2+2x+-4=0. Apply the formula: x^2+bx+c=0\to x=\frac{-b\pm \sqrt{b^2-4c}}{2}, where b=2, c=-4, bx=2x, x^2+bx=x^2+2x-4 and x^2+bx=0=x^2+2x-4=0. Apply the formula: a=b\to a=b, where a=x and b=\frac{-2\pm \sqrt{2^2-4\cdot -4}}{2}. Apply the formula: x=\frac{b\pm c}{f}\to x=\frac{b+c}{f},\:x=\frac{b-c}{f}, where b=-2, c=\sqrt{20} and f=2. Combining all solutions, the 2 solutions of the equation are.
