II gimnazjum

Matematyka wokół nas 2

a) &nbsp; (3xy−5x2y)−(10xy−2x2y)=3xy−5x2y−10xy+2x2y=−7xy−3x2y b) &nbsp; (−12abc−4a2bc)−(abc+a2bc)+12=−12abc−4a2bc−abc−a2bc+12

A. −(4−x−3)=−(1−x)=−1+x=x−1   III

a) &nbsp; a−1−(b−1)=a−1−b+1=a−b b)

∗A.(x−y)−(z−v)=x−y−z+v B.−(x+y)−(−z−v)=−x−y+z+v

a) a−b−(c−b)−(a−c)=a−b−c+b−a+c=0

16−5y+x+2x+3y−18=3x−2y−2

6p−4q+3r−(−4r−5q+2p)=6p−4q+3r+4r+5q−2p=4p+q+7r

a) 5x−[5x−(6x−2)]+(x−8)=5x−(5x−6x+2)+x−8=5x−(−1x+2)+x−8=5x+1x−2+x−8=7x−10