Question

Resolva as equaçôes do 2º grau a) x² -8x + 15 = 0 b) -4x -12 x = 0

Answer 1

Resposta:

Explicação passo-a-passo:

a) x² -8x + 15 = 0

a=1

b=-8

c=15

Δ=(-8)²-4*1*15

Δ=64-60

Δ=4

√Δ=2

x=(8+-2)/2

x'=10/2=5

x''=6/2=3

S(3,5)

b) -4x -12 x = 0

-4x(x+3)=0

x'=0

x=-3

S(0,-3)