Quadratic equations by facotring

8y62+12y-36 =0
or 2y^2 + 3y - 9 =0
or 2y^2 + 6y - 3y - 9 =0
or 2y( y + 3) - 3( y+ 3)=0
or ( y+3) ( 2y - 3) =0
so y = 3/2 & -3 answer ----------------------------------------…
4b^2 +2b- 12 =0
or 4b^2 + 8b- 6b - 12 =0
or 4b( b+ 2) - 6( b+ 2)=0
or ( 4b- 6) ( b+ 2) =0
so b= 3/2 & -2- answer----------------------------------…
3t^2 -18t+ 15 =0
or t^2 - 6t + 5 =0
or t^2 - 5t - t + 5 =0
or t( t - 5) -1( t- 5) =0
or ( t- 5) ( t- 1) =0
so t= 5 & 1 answer----------------------------------…
2x^2 + 3x - 2 =0
or 2x^2 + 4x - x - 2 =0
or 2x( x+ 2) - 1( x+ 2) =0
or ( 2x -1) ( x+2) =0
so x= 1/2 & - 2 answer

http://www.youtube.com/watch?v=yfiMho1_t4k

this video should show you how to do it.