Question

спростити вираз 2) (y² + 2y-3) + (y - y²);​

Answer 1

$\displaystyle\bf\\(y^{2} +2y-3)+(y-y^{2} )=y^{2} +2y-3+y-y^{2} =\\\\\\=\underbrace{(y^{2} -y^{2}) }_{0}+\underbrace{(2y+y)}_{3y}-3=3y-3$