Question

resolva as equações de 2 grau ,no conjunto R

Answer 1

letra d) 6x²-6-x=14+5x²
6x²-5x²-x-6-14=0
x²-x-20=0
Delta= b²-4ac
Delta=(-1)²-4*1*-20
Delta=1+80
Delta=81

x=-b+- raiz de delta/2a
x=-(-1)+- raiz de 81/2*1
x=1+-9/2
x1=1-9/2
x1=-4

x2=1+9/2
x2=5