Question

XSobre dois+x (2x-15)=o

Answer 1

x/2+x(2x-15)=0
x/2+2x²-15x=0
x+2x²-15x=0x2
2x²-4x=0
a=2
b=-4
c=0
∆b²-4ac
∆=-4²-4(2)(0)
∆=16
x=-(-4)+/-4/2
x=4-4/2
x=0/2
ou
x=4+4/2
x=8/2=4