EM-1826

Quadratic formula

E Math · Secondary 4 · Hard · Quadratic formula

A rectangle has length

(3x + 2)

cm and width

(x - 1)

cm. Its area is

44\,\text{cm}^2

. Form an equation in

x

and solve it to find the possible values of

x

.

$x = \dfrac{1 \pm \sqrt{553}}{6}$
$x = \dfrac{-1 \pm \sqrt{553}}{6}$
$x = \dfrac{1 \pm \sqrt{193}}{6}$
$x = \dfrac{-1 \pm \sqrt{193}}{6}$

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