Let r and s be the roots of 3x^2 + 4x -12=0. Find r^2+s^2
Step 1) Find the two roots by using the quadratic formula.
Step 2) Place the answers into the expression: r2 + s2.
If you are having difficulty with this, post back with what you have tried and what your results are.
Which quadratic formula
Quadratic equation: x = [ -b +/- sqrt( b2 - 4 · a · c ) ] / ( 2 · a )
In this case: a = 3 b = 4 c = -12
The guy is asking what the answer is, just saying
I think the roots are 2-2sqrt10 and 2+2sqrt10