Answered

Add:
3x^2-4x-4y; 7x^2-2y-2; -4x^2+x-y-7

Sagot :

Wilsonroycekingviz
Simplifying (3x2 + -4x + -4y) + (7x2 + -2y + -2) + (-4x2 + x + -1y + -7) 
=-4y + -2 + 7x2 + -2y + -7 + x + -4x2 + -1y
=-9 + -3x + 10x2 + -4x2 + -4y + -2y + -1y
= -7y -9 + -3x + 6x2 + -7y
=-14y -6x2 -3x -9
AngelGviz
3x^2-4x-4y 7x^2+0-2y-2 + -4x^2+x-y-7 ----------------- 6x^2-3x-7y-9