How do you solve $12t + 9 = 5t²$ ?

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Answer 1 · 2016-06-17T20:41:46

$t = 3 or t = -3/5$

Make the quadratic equal to 0.

$5t^2 - 12t -9 = 0$

$(5t + 3)(t -3) = 0 " factorise"$

$5t + 3 = 0 rArr 5t = -3 rArr t = -3/5$
$t- 3 = 0 rArr t =3$

How do you solve 12t + 9 = 5t²12t + 9 = 5t²?