Respostas
x²- 64 = 0
Δ = b²-4ac
Δ = 0 - 4.1.(-64)
Δ = 256
x = 0 ± √256 / 2
x = 0 ± 16 / 2 x1 = 0+16/2 = 16/2 = 8
x2 = 0-16/2 = -16/2 = -8
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x²- 4 = 0
Δ = b²-4ac
Δ = 0 - 4.1.(-4)
Δ = 16
x = 0 ± √16 / 2
x = 0 ± 4 / 2 x1 = 0 + 4/2 = 4/2 = 2
x2 = 0 - 4/2 = -4/2 = -2
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x²-8x = 0
Δ = b²-4ac
Δ = 64 - 4.1.0
Δ = 64
x = -(-8) ± √64 / 2
x = 8 ± 8 / 2 x1 = 8 + 8/2 = 16/2 = 8
x2 = 8-8/2 = 0/2 = 0
Boa tarde
esses equações sao incompletas , não precisa de Baskhara
x² - 64 = 0
x² = 64
x1 = -8, x2 = +8
x² - 4 = 0
x² = 4
x1 = -2
x2 = +2
x² - 8x = 0
x*(x - 8) = 0
x1 = 0
x2 = 8