Question

Zadanie 16 i 17 :-) dam naj

Answer 1

16.
a)

5/a + 7/a  Zał. a ≠0
5/a + 7/a = 12/a

b) 12x/y² + 5x/y²  y≠0
12x/y² + 5x/y² = 17x/y²

c) 2/3a + 5/a  a≠0
2/3a + 5/a = 2/3a + 15/3a = 17/3a

d) 4/x + 2/5x   x ≠ 0
4/x + 2/5x = 20/5x + 2/5x = 22/5x

e) 7/10y + 4/15y  y≠0
7/10y + 4/15y = 21/30y + 8/30y = 29/30y

f) 2a/3b + a/8b  b≠0
2a/3b + a/8b = 16a/24b + 3a/24b = 19a/24b

2.
Zrobie 2 ostatnie bo się spiesze.

h)  (3a-1)/2b-(7a+3)/8b = (12a-4)/8b - (7a+3)/8b = (12a-4-7a-3)/8b = (5a-7)/8b
b≠0
i)
a ≠ 0 
(2-5a)/3a - (4a-1)/4a = (8-20a)/12a - (12a-3)/12a = (8-20a-12a+3)/12a = (-32a+11)/12a