EM-193

Changing the subject of a formula

E Math · Secondary 3 · Hard · Changing the subject of a formula

Given that

A = \dfrac{m^2 - 9}{4p}

, make

m

the subject of the formula.

$m = \pm\sqrt{4pA + 9}$
$m = \sqrt{4pA - 9}$
$m = \dfrac{4pA + 9}{2}$
$m = \pm\sqrt{\dfrac{A}{4p} + 9}$

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