Oblicz:
a) 5*(a+b)-(b-a)
-----------------=
2
b)8x*(2x+1)-5*(x^2+2x)
--------------------------=
x
a) (5a+5b-b+a)/2 = (6a+4b)/2 = 3a + 2b
b)
(8x^2+8x-5x^2-10x)/x = (3x^2-2x)/x=3x-2
1
5a-5b-5b+5a----------------- = (10a-10b) :2= 5a-5b
16x^2+8x-5x^2-10x^2 x^2+8x
------------------------------- =----------- =(x^2+8x):x=x+8
x x
Mam nadzieję że pomogłam :P
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a) (5a+5b-b+a)/2 = (6a+4b)/2 = 3a + 2b
b)
(8x^2+8x-5x^2-10x)/x = (3x^2-2x)/x=3x-2
1
5a-5b-5b+5a
----------------- = (10a-10b) :2= 5a-5b
2
2
16x^2+8x-5x^2-10x^2 x^2+8x
------------------------------- =----------- =(x^2+8x):x=x+8
x x
Mam nadzieję że pomogłam :P