Question

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Answer 1

[Nguyễn Hoàng Minh]

\(a,=\sqrt{x^3}-1=x\sqrt{x}-1\\ b,=\sqrt{x^3}-\sqrt{y^3}=x\sqrt{x}-y\sqrt{y}\\ c,=8\sqrt{x^3}+\sqrt{y^3}=2x\sqrt{x}+y\sqrt{y}\)

Answer 2

[Lấp La Lấp Lánh]

a) \(\left(\sqrt{x}-1\right)\left(x+\sqrt{x}+1\right)=\left(\sqrt{x}\right)^3-1=x\sqrt{x}-1\)

b) \(\left(\sqrt{x}+\sqrt{y}\right)\left(x-\sqrt{x}.\sqrt{y}+y\right)=\left(\sqrt{x}\right)^3+\left(\sqrt{y}\right)^3=x\sqrt{x}+y\sqrt{y}\)

c) \(\left(2\sqrt{x}+\sqrt{y}\right)\left(3\sqrt{x}-2\sqrt{y}\right)=6x-4\sqrt{xy}+3\sqrt{xy}-2y=6x-\sqrt{xy}-2y\)