EM-1863

Quadratic formula

E Math · Secondary 4 · Hard · Quadratic formula

The quadratic equation

5x^2-7x-24=0

models the price of a fruit. Solve

5x^2-7x-24=0

for

x

.

$x=3\text{ or }x=-1.6$
$x=3\text{ or }x=1.6$
$x=\dfrac{7\pm23}{5}$
$x=-3\text{ or }x=1.6$

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