w(x)=5(x-2)(x+2)-(x-2)²=(x-2)(5x+10-x+2)=(x-2)(4x+12)=4(x-2)(x+3)
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w(x)=5(x-2)(x+2)-(x-2)²=(x-2)(5x+10-x+2)=(x-2)(4x+12)=4(x-2)(x+3)