Question

solve 3y^2-72=0

Answer 1

\[3y^2-72=0\]

Answer 2

Sp, we're solving for y.

Answer 3

So*

Answer 4

subtract 3y^2 to both sides.

Answer 5

\(\bf 3y^2-72=0\implies 3y^2\cancel{ -72+72 }=0+72\implies 3y^2=72
\\ \quad \\
\cfrac{\cancel{ 3 }y^2}{\cancel{ 3 }}=\cfrac{\cancel{ 72 }}{\cancel{ 3 }}\implies y^2=24
\\ \quad \\

taking\qquad \sqrt{\qquad }
\\ \quad \\
\sqrt{y^2}=\sqrt{24}\implies ?\)

Answer 6

I can't think right now, but your answer would be y=2 sqrt6

Answer 7

@jdoe0001 will that be correct?

Answer 8

y = 2 square root 6