Question

4+X (X-4)=X Me ajudem por favor

Answer 1

Olá,

4 + x(x - 4) = x
4 + x² - 4x = x
x² - 4x - x + 4 = 0
x² - 5x + 4 = 0
Δ = (-5)² - 4*1*4
Δ = 25 - 16
Δ = 9

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

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

S = {4, 1}

Bons estudos ;)

Answer 2

4+x²-4x=x
4+x²-5x=0
x²-5x+4=0
x=-(-5)±√(5-)²-4x1x4
2x1
x=5+√9
2
x= 5+3
2
x=5-3
2
x=4
x=1
x1=1,x2=4