Question

Tính : 

a) \(10x3y5-5xy+5x3y5+8xy\)

b) \(5xy^2\left(\frac{-3}{10}x^2y\:\right)+\frac{3}{4}x^3y^3\)

c) \(\frac{2}{5}x^4y^5\left(\frac{5}{4}x^2y^3\right)+\frac{5}{2}x^2y^3\left(\frac{-9}{10}x^4y^5\right)\)

d) \(-5x^2y+12xy^2+7xy-10xy+3x^2y-4xy^2\)

e) \(\frac{1}{4}x^2-\left(\frac{5}{2}x-\frac{7}{2}x^2-1\right)+\left(\frac{5}{2}x-1+\frac{1}{2}x\right)\)

CÁC PN GIÚP ^_^ MIK VS NHA ! GHI RÕ RA (^_-) GIÙM MIK NHÉ ! THANK YOU (≧▽≦) VERY MUCH ! (^_^)

Answer 1

a) 15x³y⁵+3xy

c)(-7/4)x⁶y⁸

d) -2x²y+8xy²-3xy

e)15/4x²+1/2x

Answer 2

a )x=2   y=3

b)x=5   y=13

c)x=1  y=3

d)x=9  y=13 

e)x=0  y=8