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2. 5ab + 2a²/a = 5ab + 2a= a(5b + 2)
3. 8ab + a(b+3a)/3a= 8ab +ab/3a + 3a²/3a = 8ab + b/3 + a
4. 7c²+2c/0,5c= 7c²+ 4
5. 8x(2x+1)-5(x²+2x)/x = 16x²+8x - 5x²/x -10x/x = 16x² + 8x- 5x - 10= 16x²+3x-10
proszę ;)