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W(x)= x(x²+2x-16)-32
W(x)=(x-32)(x²+2x-16)
__x=32___∨___ x²+2x-16
____________Δ=b²-4ac
____________Δ=2²-4×1×(-16)
____________Δ=4+64
____________Δ=68
____________√Δ=√68=√4×17
____________√Δ=2√17
x₁=(-b-√Δ)/2a =(-2-2√17)/2= -2(1+√17)/2=-1-√17
x₂=(-b+√Δ)/2a=(-2+2√17)/2= -2(1-√17)/2=-1+√17