x^{2}-8x+16=2x^{2}-16x+32
x²-8x+16=2x²-16x+32
(x-4)²2(x-4)²
x²-2x²-8x+16x+16-32
-x²+8x-16=0 |/(-1)
x²-8x+16=0
Δ=8²-4*1*16
Δ=64-64
Δ=0
x=-b/2a
x=8/2
x=4
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x²-8x+16=2x²-16x+32
(x-4)²
2(x-4)²
x²-8x+16=2x²-16x+32
x²-2x²-8x+16x+16-32
-x²+8x-16=0 |/(-1)
x²-8x+16=0
Δ=8²-4*1*16
Δ=64-64
Δ=0
x=-b/2a
x=8/2
x=4