Question 67735
Original Equation: {{{3x^2-8=100}}}
Steps:
{{{3x^2-8+8=100+8}}} (cancel out 8 on left)
{{{3x^2/3=108/3}}} (isolate variable)
{{{x^2=36}}} (simplify)

Now, we know that 36's square root is 6.

So, 
Final Answer: {{{x=6}}}