I gimnazjum

Policzmy to razem 1

a) 6ab​+8ac​​−2ab​−2ab​+3ac​​+4bc​​​−4bc​​​= &nbsp; 2ab+11ac

a) 8x2t−4t⋅t⋅x⋅(−2)⋅x+2tx2= &nbsp; 8x2t+8t2x2+2tx2= &nbsp;    =8⋅(0,1)2⋅0,5+8⋅(0,5)2⋅(0,1)2+2⋅0,5⋅(0,1)2=

a) 8xy⋅13x2y= &nbsp; 104x3y2 &nbsp; b) 0,24x2y⋅(−0,75xy2)= &nbsp; 0,24​0,06x2y⋅(−413​xy2)=

a) −(x+2y−3)=−x−2y+3 &nbsp; b) 8−(y−3x+4)=

a) (x+2y)+(6x−3)= &nbsp; x+2y+6x−3= &nbsp; 7x+2y−3 &nbsp; b) (−5x−5y)+(−3x+8y)= &nbsp; −5x−5y−3x+8y=

a) −[6−(x2+y2)]+x2−y2= &nbsp; −[6−x2−y2]+x2−y2= &nbsp;    =−6+x2+y2+x2−y2= &nbsp; −6+2x2 &nbsp; &nbsp; b) −(6xy+1)−[−(−2+8xy)]=