Question

resolva as seguintes equacao do 2 grau

Xao quadrado - 3x-4=0

Answer 1

x²-3x-4=0

/\=(-3)²-4.1.(-4)
/\=9+16
/\=25

x'= -(-3)+5 /2
x'=8/2
x'=4

x"= -(-3)-5 /2
x"=3-5 /2
x"= -2/2
x"= -1

S={4,-1} Bjs