Question

mình cần 2 bài đầu ạ

Answer 1

a) \(\sqrt{7x^2}=\sqrt{7}x\)

b) \(\sqrt{8y^2}=2\sqrt{2}y\)

c) \(\sqrt{25x^3}=5x\sqrt{x}\)

d) \(\sqrt{48y^4}=4\sqrt{3}y^2\)

Answer 2

a) \(x\sqrt{5}=\sqrt{5x^2}\)

b) \(x\sqrt{13}=\sqrt{13x^2}\)

c) \(x\sqrt{\dfrac{11}{x}}=\sqrt{11x}\)

d) \(x\sqrt{\dfrac{-29}{x}}=\sqrt{-29x}\)

Answer 3

1.

a, \(\sqrt{7x^2}=\sqrt{7}x\)

b, \(\sqrt{8y^2}=-\sqrt{8}y\)

c, \(\sqrt{25x^3}=5x\sqrt{x}\)

d, \(\sqrt{48y^4}=4\sqrt{3}y^2\)

Answer 4

2.

a, \(x\sqrt{5}=\sqrt{5x^2}\)

b, \(x\sqrt{13}=-\sqrt{13x^2}\)

c, \(x\sqrt{\dfrac{11}{x}}=\sqrt{\dfrac{11x^2}{x}}=\sqrt{11x}\)

d, \(x\sqrt{-\dfrac{29}{x}}=-\sqrt{-\dfrac{29x^2}{x}}=-\sqrt{-29x}\)