how do i solve 12x^2=36. Give both exact solutions and approximate solution to the nearest hundredth.

Question

.sam. · Answer

You don't need quadratic formula here,
 12x^2=36
x^2=3
$$x= \pm \sqrt{3}$$

anonymous · Answer

so basically how do i do this? do i just simplify?

.sam. · Answer

$$ 12x^2=36$$
divide both sides by 12
$$ x^2=3$$
square root both sides
x=±√3

anonymous · Answer

so what if its (x+3)^2=81

.sam. · Answer

then square root both sides first
(x+3)^2=81
$$x+3=\pm \sqrt{81}$$

anonymous · Answer

oh okay so its ±√81?

.sam. · Answer

$$x+3=\pm \sqrt{81}$$
$$x+3=\pm 9$$
------------------------------------
x+3=9      and     x+3=-9
x=6                     x=-12

jiteshmeghwal9 · Answer

If there is square of x at L.H.S then after taking it to other side it will be sqrt of 36 so ,$$12x=\sqrt{36}$$$$12x=6$$$$x=\frac{6}{12} \implies \frac{1}{2}$$

jiteshmeghwal9 · Answer

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