II gimnazjum

Matematyka wokół nas 2

a)4x−3y−10x−4y+7y=(4x−10x)+(−3y−4y+7y)=−6x

a)(4x3+7x−3)+(x3+3−x)=4x3+7x−3+x3+3−x=4x3+x3+7x−x−3+x=5x3+6x

a)(2x3+3x+7)−(5x3−4x+6)=2x3+3x+7−5x3+4x−6=2x3−5x3+3x+4x+7−6=−3x3+7x+1

a)(5m−8)+(4−7m)−(m−5)−(20+4m)=5m−8+4−7m−m+5−20−4m=5m−7m−m−4m−8+4+5−20=−7m−19

a)(8x2y+6xy−12xy2)−(10xy2+8x2y+7xy)=8x2y+6xy−12xy2−10xy2−8x2y−7xy=8x2y−8x2y+6xy−7xy−12xy2−10xy2=−xy−22xy2