a) \(\sqrt{128\left(x-y\right)^2}\)

\(=\sqrt{8^2\cdot2\left(x-y\right)^2}\)

\(=\left|8\left(x-y\right)\right|\sqrt{2}\)

\(=8\left|\left(x-y\right)\right|\sqrt{2}\)

b) \(\sqrt{150\left(4x^2-4x+1\right)}\)

\(=\sqrt{5^2\cdot6\left(2x-1\right)^2}\)

\(=\left|5\left(2x-1\right)\right|\sqrt{6}\)

\(=5\left|2x-1\right|\sqrt{6}\)

c) \(\sqrt{x^3-6x^2+12x-8}\)

\(=\sqrt{\left(x-2\right)^3}\)

\(=\sqrt{\left(x-2\right)^2\left(x-2\right)}\)

\(=\left|x-2\right|\sqrt{x-2}\)

a: \(=\sqrt{64\cdot2\cdot\left(x-y\right)^2}=8\sqrt{2}\cdot\left|x-y\right|\)

b; \(=\sqrt{25\cdot6\left(2x-1\right)^2}=5\sqrt{6}\cdot\left|2x-1\right|\)

c: \(=\sqrt{\left(x-2\right)^3}=\left|x-2\right|\cdot\sqrt{x-2}\)

đưa thừa số vào trong dấu căn*

mình nhầm

a: \(a^2\cdot\sqrt{\dfrac{2}{3a}}=a^2\cdot\dfrac{\sqrt{2}}{\sqrt{3}\cdot\sqrt{a}}=\dfrac{a\sqrt{2}}{\sqrt{3}}=\dfrac{a\sqrt{6}}{3}\)

b: \(\dfrac{x-3}{x}\cdot\sqrt{\dfrac{x^3}{9-x^2}}\)

\(=\dfrac{x-3}{x}\cdot\dfrac{x\sqrt{x}}{\sqrt{x-3}\cdot\sqrt{x+3}}\)

\(=\dfrac{\sqrt{x}\cdot\sqrt{x-3}}{\sqrt{x+3}}\)

\(\sqrt{48\cdot45}=12\sqrt{15}\\ \sqrt{225\cdot17}=15\sqrt{17}\\ \sqrt{a^3b^7}=\left|ab^3\right|\sqrt{ab}=ab^3\sqrt{ab}\\ \sqrt{x^5\left(x-3\right)^2}=\left|x^2\left(x-3\right)\right|\sqrt{x}=x^2\left(x-3\right)\sqrt{x}\)

\(\sqrt{48\cdot45}=4\sqrt{3}\cdot3\sqrt{5}=12\sqrt{15}\)

\(\sqrt{225\cdot17}=15\sqrt{17}\)

\(\sqrt{x^3-6x^2+12x-8}\)

\(=\sqrt{\left(x-2\right)^3}\)

\(=\left|x-2\right|\cdot\sqrt{x-2}\)

\(\sqrt{18b^3\cdot\left(1-2a\right)^2}\)

\(=3\sqrt{2}\cdot b\sqrt{b}\cdot\left|1-2a\right|\)

\(=3\sqrt{2}\left(2a-1\right)\cdot b\sqrt{b}\)

a/ \(\sqrt{50a}=5\sqrt{2a}\)

b/ \(\sqrt{75x}=5\sqrt{3x}\)

a)\(5\sqrt{2a}\)

b)\(5\sqrt{3x}\)

a) \(\sqrt{50a}=\sqrt{25.2}=5\sqrt{2a}\)

b) \(\sqrt{75x}=\sqrt{25.3x}=5\sqrt{3x}\)

Nếu sai mong bạn thông cảm:

\(\sqrt{50.6}=\sqrt{300}=\sqrt{2^2.5^2.3}=2.5\sqrt{3}=10\sqrt{3}\)

\(\sqrt{50\cdot6}=\sqrt{300}=10\sqrt{3}\)

ĐỀ bài bài 2 là: Đưa thừa số vào dấu căn bậc hai