Resposta :
03) "C"
x²-5x-5x+25 = 25-9x
x²-10x+9x = 0
x²-1x = 0
x(x-1) = 0
x=0/x=-1
04 "A"
D = b²-4ac
D = (-4)²-4×1×3
D = 16-12>> D = 4
x = (-b+‐√D)÷2
x = (4+-√4)÷2
x' = (4+2)÷2>> x' = 3
x" = (4-2)÷2>> x" = 1
Explicação passo-a-passo:
Prontinho,-,
03) "C"
x²-5x-5x+25 = 25-9x
x²-10x+9x = 0
x²-1x = 0
x(x-1) = 0
x=0/x=-1
04 "A"
D = b²-4ac
D = (-4)²-4×1×3
D = 16-12>> D = 4
x = (-b+‐√D)÷2
x = (4+-√4)÷2
x' = (4+2)÷2>> x' = 3
x" = (4-2)÷2>> x" = 1
Explicação passo-a-passo:
Prontinho,-,