How do you simplify sqrt(27x^2y) - sqrt(45xy^2) +sqrt(108x^2y) - sqrt(125xy^2)27x2y45xy2+108x2y125xy2?

1 Answer
May 16, 2015

sqrt(27x^2y)-sqrt(45xy^2)+sqrt(108x^2y)-sqrt(125xy^2)27x2y45xy2+108x2y125xy2

= sqrt(9x^2*3y)-sqrt(9y^2*5x)+sqrt(36x^2*3y)-sqrt(25y^2*5x)=9x23y9y25x+36x23y25y25x

= sqrt((3x)^2*3y)-sqrt((3y)^2*5x)+sqrt((6x)^2*3y)-sqrt((5y)^2*5x)=(3x)23y(3y)25x+(6x)23y(5y)25x

= sqrt((3x)^2)sqrt(3y)-sqrt((3y)^2)sqrt(5x)+sqrt((6x)^2)sqrt(3y)-sqrt((5y)^2)sqrt(5x)=(3x)23y(3y)25x+(6x)23y(5y)25x

= 3xsqrt(3y)-3ysqrt(5x)+6xsqrt(3y)-5ysqrt(5x)=3x3y3y5x+6x3y5y5x

= (3x+6x)sqrt(3y)-(3y+5y)sqrt(5x)=(3x+6x)3y(3y+5y)5x

= 9xsqrt(3y)-8xsqrt(5x)=9x3y8x5x