EM-558

Quadratics by factorisation

E Math · Secondary 3 · Medium · Quadratics by factorisation

Solve the quadratic equation

x^2 - 6x - 3240 = 0

.

$x = 60$ or $x = -54$
$x = 54$ or $x = -60$
$x = 36$ or $x = -90$
$x = 90$ or $x = -36$

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