I gimnazjum

Matematyka wokół nas 1

a)&nbsp; 3x+5x−3x=5x b)&nbsp; −2y−5y+2y=−5y

a)&nbsp; −2a+b−a−2b+3a=−b b)&nbsp; −ab+b2+3ab−2ab=b2

a)&nbsp; (2x2+4x−3)+(−x2−2x+4)=2x2+4x−3−x2−2x+4=x2+2x+1 b)&nbsp; (53​m2+32​n2+6)+(−31​m2−32​n2−253​)=

a)&nbsp; (6a2+2a+1)−(−3a2−2a+5)=6a2+2a+1+3a2+2a−5=9a2+4a−4 b)&nbsp; (1221​m2−141​n2−1,6)−(241​m2+343​n2+2,4)=

a) 5x+(2x−7)−9x−(−3x+8)+20−8x=5x+2x−7−9x+3x−8+20−8x=−7x+5