Bài làm
a) \(\left(-2\right)^5:\left(-2\right)^3\)
\(=\left(-2\right)^{5-3}\)
\(=\left(-2\right)^2\)
\(=4\)
b) \(\left(-y\right)^7:\left(-y\right)^3=\left(-y\right)^{7-3}=\left(-y\right)^4=y^4\)
c) \(x^{12}:\left(-x\right)^{10}=x^{12}:x^{10}=x^{12-10}=x^2\)
d) \(\left(2x\right)^6:\left(2x\right)^3=\left(2x\right)^{6-3}=\left(2x\right)^3=8x^3\)
e) \(\left(-3x\right)^5:\left(-3x\right)^2=\left(-3x\right)^{5-2}=\left(-3x\right)^3=-27x^3\)
f) \(\left(xy^2\right)^4:\left(xy^2\right)^2=\left(xy^2\right)^{4-2}=\left(xy^2\right)^2=x^2y^4\)
# Học tốt #
a) (-2)5 : (-2)3 = (-2)2
b) (-y)7 : (-y)3 = (-y)4
c) x12 : (-x10) = (-x)12
d) 2x6 : 2x3 = 2x3
e) (-3x)5 : (-3x)2 = (-3x)3
f) (xy2)4 : (xy2)2 = (xy2)2
