Question

m ajudem nessa aqui $x^{2} -20x=0$

Answer 1

x²-20x=0

a=1 b=-20 c=0

Δ=b²-4ac
Δ=(-20)²-4.1.0
Δ=400

√400= 20

-b+ ou - √400
       2.a

x¹=20+20 = 40/2= 20
       2

x²=20-20 = 0/2
       2

S={0,20}

Answer 2

  eq.incompleta

x(x-20) = 0

x1= 0

x2 - 20 = 0 ==> x2  =  20

V= { 0, 20 }