19. Efectuați:
1
4x-6
5x+3
5
+
a)
2
x-1
+
b)
(x+5 x2-25 x2-10x+25)
4x-3 4x+3 16x2-9
55-11x 7x2-70x+175
14(7x+22) x+5
-2%;
4x-3
10
+
x-
x-y
2√√xy+y
1
+
√x-√y
√x-√y
6x2-24y² 9
3(x+2y)
18
x-2y
2
2x
5.x
(4x-3)2
d)
+
+8
6x+7x2-16
4x-3 4x+3
4x²-3x+3
2
e)
2
53-x-xx(x+4)+16 7x-3
)²++4x+163-64
x+4 2x+25
+
2x+1
-1.
x-4
1
2
x
5-x²
1)
x-3+-
2-9 x+3x-3
x+3
x+7 x+3
2-x
12x+10
g)
x
x+1 x²+x,
x3+2x² + x
Helppppp