Question

Resolva as equações abaixo : a)x²+3x-4=0 b)6x²+x-1=0 c)-16x²+8-1=0 d)2x²-5x+6=0 e)-9x²+6x-5=0 f)2x²+9=x²-6x g)x²+9x+16=3x²-2

Answer 1

a) x1=-4 x2=1
d)x1= 6  x2=1