Question

determine as raízes das equaçoes a seguir
a) (2x+ 3)(x -1)=3

b)2y^2+3y -14=0​

Answer 1

a) (2x+ 3)(x -1)=3

2x²-2x+3x-3=3

2x²+x-6=0

x'=[-1+√(1+48)]/4=(-1+7)/4=3/2

x''=[-1-√(1+48)]/4=(-1-7)/4=-2

b)2y^2+3y -14=0​

y'=[-3+√(9+1129)]/4=(-3+11)/4=2

y''=[-3-√(9+1129)]/4=(-3-11)/4=-7/2