how do u solve 9a (squared) - 30 =3a

Question

owlfred · Answer

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anonymous · Answer

first you can see that you can divide it by 3 and put everything to the left hand side to get

3a^2-a-10=0

anonymous · Answer

now you can factor it or just use the formula for quadratic expressions

amistre64 · Answer

complete squares is easiest

amistre64 · Answer

$9a^2 - 30 =3a  ;$   +30, -3a, /9

$$9(a^2 -{1\over3}a) = 30 $$

$9(a-{1\over6})^2 = 30 +{9\over36}$;   /9

$$a-{1\over6} = \pm \sqrt{{10\over3} +{1\over36}}$$

$$a = {1\over6} \pm {\sqrt{13}\over6}$$
maybe lol

amistre64 · Answer

the latex slows me down