How do you find the sum or difference of $(x^2y-3x^2+y)+(3y-2x^2y)$ ?

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Answer 1 · 2018-04-30T17:12:37

$-3x^2 -x^2y+4y$

In this expression the brackets are not necessary because it is an addition.

$color(blue)(x^2y) color(red)(" "- 3x^2) color(green)(" "+y +3y) color(blue)(" "-2x^2y)" "larr$ identify the like terms

$=color(red)(-3x^2) color(blue)(" "+x^2y -2x^2y) color(green)(" "+y+3y)" "larr$ re-arrange

$=color(red)(-3x^2)" " color(blue)(-x^2y) color(green)(" "+4y)" "larr$ simplify the like terms

How do you find the sum or difference of (x^2y-3x^2+y)+(3y-2x^2y)(x^2y-3x^2+y)+(3y-2x^2y)?