Làm tính chia
a) 53 : (-5)2
b)\(\left(\dfrac{3}{4}\right)^5:\left(\dfrac{3}{4}\right)^3\)
Giúp mình nhé HUYNH NHAT TUONG VY ,@Huỳnh Vy
a/\(5^3:\left(-5\right)^2=5^3:5^2=5^{3-2}=5\)
b/\(\left(\dfrac{3}{4}\right)^5:\left(\dfrac{3}{4}\right)^3=\left(\dfrac{3}{4}\right)^{5-3}=\left(\dfrac{3}{4}\right)^2=\dfrac{9}{16}\)
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