Question

4x ao quadrado - 11x-3=0
Me ajudem por favor?

Answer 1

4x² -11x -3=0

a=4
b=-11
c=-3

Δ=b²-4ac
Δ=(-11)²-4(4)(-3)
Δ=121+48
Δ=169

x=(-b±√Δ)2a= [-(-11)±√169]/2.(4)=(11±13)/8

x'=(11+13)/8=24/8=3

x"=(11-13)/8=-2/8= -1/4

S={ -1/4 ,3}