Question

Solve the equation.

Answer 1

\[3x ^{2}+81=0\]

Answer 2

Would I simplify it and make the two binomials equal 0 and solve for x?

Answer 3

You want to isolate x^2 to one side

Answer 4

then take the square root of both sides

Answer 5

make sure you divide off the coefficient on x^2, of course

Answer 6

soo wait..

Answer 7

yup and remember square root gives a positive and negative answer

Answer 8

1. Divide by 3 on both sides.
2) subtract 81 to both sides
3)Square root both sides
Is that right?

Answer 9

yes

Answer 10

actually that wouldn't work square root of a negative

Answer 11

can't take root of -81/3

Answer 12

but if it's a square root of a negative wouldn't it be an imaginary number?

Answer 13

well you can.... but you know what i mean

Answer 14

factor out i.

Answer 15

in calculus you dont use unreal answers

Answer 16

I'm in Algebra 2/Trig..? does it matter? Jw..

Answer 17

Well, considering your last question involved imaginary numbers, I imagine that is what you're looking for

Answer 18

yes it is..