Odpowiedź :
Zadanie
A= 3x + 4y - 2
B = 6x + 4y - 5
A + B
3x + 4y - 2 + (6x + 4y - 5) = 3x + 4y - 2 + 6x + 4y - 5 = 9x + 8y - 7
A - B
3x + 4y - 2 - (6x + 4y - 5) = 3x + 4y - 2 - 6x - 4y + 5 = - 3x + 3
Odpowiedź:
[tex]A=3x+4y-2\ \ ,\ \ B=6x+4y-5\\\\\\A+B=3x+4y-2+(6x+4y-5)=3x+4y-2+6x+4y-5=9x+8y-7\\\\\\A-B=3x+4y-2-(6x+4y-5)=3x+4y-2-6x-4y+5=-3x+3[/tex]