Question

儒儒

第三小題

-
-
=
SED
- =
=a (5+1) - (+1)
: (6+1) (a-1)
(2) FIT= (ab+ ab) – (a +1)
=ab (a?+1) – (a?+1)
(a +1) (ab-1)
(3) Fit= (x’y+xy) + (x'+x) - (x²+1)-1)
=xy (x²+1) +x (x²+1) – (x²+1)
= (x? +1) (xy+x-1)
類題。因式分解下列各式:
(1) x’y-xy+x-1 (X+1)x9.
(2) xºy² + xy2-x-1
(1- (3) ax-by+ay-bx-x-y
- =
) =X90 (170)
(
exy = ij 771
- 18-goca-b-)

Answer 1

我就是我

(ax+ay)+(-bx-by)+(-x-y)
=a(x+y)-b(x+y)-(x+y)
=(a-b-1)(x+y)