Question

1)\(\frac{21^2.14.125}{35^2.6}\) 

2)\(\frac{45^3.20^4.18^2}{180^5}\)

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Answer 1

ti ck mik nhá

Answer 2

\(\frac{21^2\cdot14\cdot125}{35^2\cdot6}=\frac{3^2\cdot7^2\cdot2\cdot25\cdot3}{5^2\cdot7^2\cdot2\cdot3}=\frac{3^4\cdot7^2\cdot2\cdot5^2}{5^2\cdot7^2\cdot2\cdot3}=3^3=27..\)

\(\frac{45^3\cdot20^4\cdot18^2}{180^5}=\frac{5^3\cdot9^3\cdot4^4\cdot5^4\cdot2^2\cdot9^2}{2^{10}\cdot3^{10}\cdot5^5}=\frac{5^7\cdot9^5\cdot4^4}{4^5\cdot9^5\cdot5^5}=\frac{1}{4}=0.25\)

Answer 3

1)   = 7*3*2*7*5*5*5/7*5*7*5*2*3

câu 2 tt

Answer 4

ban nhan ma oi ! sao luc phan h  ra 14 thi  chi co 2 thoi vay

dang ra phai la 2 x 7 chu

mk chua hieu lam

ban giai thich cho mk dc hok

Answer 5

mình nhầm đó bn àk