[(2x+y)²-y(y-4x)]÷[-1/4x]
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[(2x+y)²-y(y-4x)]÷[-1/4x]
[(2x+y)²-y(y-4x)]÷[-1/4x]
[(2x+y)²-y(y-4x)]÷[-1/4x]
=(4X²+4XY+Y²-Y²+4XY)*(-4X)
=(4X²+8XY)*(-4X)
=-16X³-32X²Y
[(2x+y)²-y(y-4x)]÷[-1/4x]
=-4x(4x²+4xy+y²-y²+4xy)
=-4x(4x²+8xy)
=-16x²(x+2y)
=(4x2+4xy+y2-y2+4xy)/(-1/4x)
=(4x2+8xy)/(-1/4x)
=-x-2y