EM-1874

Quadratics by factorisation

E Math · Secondary 4 · Medium · Quadratics by factorisation

Solve the equation

-0.5x^2 + x + 4 = -x

by rearranging it into a quadratic equation and factorising.

$x = 2 + 2\sqrt{3}$ or $x = 2 - 2\sqrt{3}$
$x = -2 + 2\sqrt{3}$ or $x = -2 - 2\sqrt{3}$
$x = 4 + 2\sqrt{3}$ or $x = 4 - 2\sqrt{3}$
$x = 2 + \sqrt{3}$ or $x = 2 - \sqrt{3}$

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