April 2023 1 20 Report
.Diga Ud. si es verdadero o falso : 
13.
3y 1
5(3y2
3y  1
 1)
10. ( y - 2) ( y + 5) = 5y + 3 y – 10
(V) (F)
a) 1 b) 5 c) y
d) 1/5 e) y
14. (3 + x) (3 - y) – (3x – 3y - xy)
a) 0 b) 3 c) 9
d) 1 e) 0
15. (1 + x) (1 - x) = E
5 5 5
6. (x - y) (x + y) = x
2
+ y
2
(V) (F)
7. (2x - 3) (2x + 4) = 4x2
+ x + 12 (V) (F)
8. (yx - 1) (yx + 3) = y2x2 + 2yx – 3 (V) (F)
9. (3x2
+ y) (3x2
- y) = 9x4
– y
2
(V) (F)

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