Question

3. Vamos calcular:
a) (15a - 7b + 4c) + (-8b + 3C - 9a)
b) (2y? – 3ay + 4a?) - (ay - 5y? -- a?)
c) (3a’ - 2a²b + Sab’ - 6b") + (Ja’b - 5a +
+ b3 - 6ab)
d) (x² – 3xy + y - x?y?)-(-x? - 52'y? - y? - 3xy)
e) (a? - 1,6b' + 0,9c) - (0,8a? - b? + 1,7c")
) (7a? - 3ab + 2b”) – (3a? - 5ab - (? – 3b) +
+ (-6ab + c)
g) (0,9x? - 1,8% + 1) + (-1,32? + 2,6x - 2)
(0,7x? - 1,6x? + 0,4x + 5)
h) (ab + a’b? - 7a -b) - (4a’b? - 7a + 3b - ab) +
+ (4b + 5a’b?)
i) (7y - 2y + 3y - 5) + (yº - 4y + 9) - (5y +
+ 4y²-y + 1)

Answer 1

2y? – 3ay + 4a?) - (ay - 5y? -- a?)

c) (3a’ - 2a²b + Sab’ - 6b") + (Ja’b - 5a +

+ b3 - 6ab)

d) (x² – 3xy + y - x?y?)-(-x? - 52'y? - y? - 3xy)

e) (a? - 1,6b' + 0,9c) - (0,8a? - b? + 1,7c")

) (7a? - 3ab + 2b”) – (3a? - 5ab - (? – 3b) +

+ (-6ab + c)

g) (0,9x? - 1,8% + 1) + (-1,32? + 2,6x - 2)

(0,7x? - 1,6x? + 0,4x + 5)

h) (ab + a’b? - 7a -b)