Toán Lớp 9: Tính : √x(√x-1)(√x-1)
√x(√x+1)(√x+1)
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Toán Lớp 9: Tính : √x(√x-1)(√x-1)
√x(√x+1)(√x+1)
Comments ( 2 )
=sqrtx(sqrtx-1)^2
=sqrtx(x-2sqrtx+1)
=xsqrtx-2x+sqrtx
=(x+1)sqrtx-2x
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sqrtx(sqrtx+1)(sqrtx+1)
=sqrtx(sqrtx+1)^2
=sqrtx(x+2sqrtx+1)
=xsqrtx+2x+sqrtx
=(x+1)sqrtx+2x