Question

приведите подобные одночлены 1,5XY²+4,1X²Y-7XY²+3X²Y

Answer 1

1,5XY²+4,1X²Y-7XY²+3X²Y=7,1X²Y-5,5XY²

Answer 2

$1.5xy^2+4.1x^2y-7xy^2+3x^2y=(4.1+3)x^2y+(1.5-7)xy^2=7.1x^2y-5.5xy^2$