Question

giúp mình câu 4 và 5 đc ko ạ! mình cảm ơn nhiều

Answer 1

3.

a, \(\sqrt{18x}=3\sqrt{2x}\)

b, \(\sqrt{75x^2y}=5\left|x\right|\sqrt{3y}\)

c, \(11\left|xy\right|\sqrt{5x}\)

Answer 2

4.

a, \(\sqrt{128\left(x-y\right)^2}=8\sqrt{2}\left|x-y\right|\)

b, \(\sqrt{150\left(4x^2-4x+1\right)}=5\sqrt{6}\left|2x-1\right|\)

c, \(\sqrt{x^3-6x^2+12x-8}=\sqrt{\left(x-2\right)^3}=\left|x-2\right|\sqrt{x-2}\)

Answer 3

Answer 4

5.

a, \(3\sqrt{5}=\sqrt{9.5}=\sqrt{45}\)

b, \(5\sqrt{6}=\sqrt{25.6}=\sqrt{150}\)

c, \(\dfrac{2}{7}\sqrt{35}=\sqrt{\dfrac{4}{49}.35}=\sqrt{\dfrac{20}{7}}\)

Answer 5

Câu 5:

a: \(3\sqrt{5}=\sqrt{45}\)

b: \(5\sqrt{6}=\sqrt{150}\)

c: \(\dfrac{2}{7}\sqrt{35}=\sqrt{\dfrac{140}{49}}=\sqrt{\dfrac{20}{7}}\)