功課 help math...

a) 2(x+2)-2y=
2(6+2)-2(-2)
=2(8)+4
=16+4
=20

b. x二次方-y二次方=
x^2-y^2
=6^2-(-2)^2
=36-4
=32

a. 2 x (6 + 2) - 2 x -2
= 2 x 8 - -4
= 16 +4
= 20


b. (6 x 6) - (-2 x -2)
= 36 - 4
= 32

不要做社會垃圾,功課是要自己做的!!!

2(X+2)-2y=-2
2X(6+2)-2X-2......