1.wykonaj mnożenie
(pierwiastek z 3 +2pierw.2)(2pierwi.3-pierw. z 2)
2.rozwiąż równanie
3x-1 -5x+1 =x+1
___ ___ ___ -3
5 6 8
3.rozwiąż nierówność
(x-1) do kwad.+7 > (x+4) do kwad.
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(√3+2√2)(2√3-√2)=2√9-√6+4√6-2√4=2*3-√6+4√6-2*2=6-√6+4√6-4=2+3√6
3x-1 5x+1 x+1
___ - ___ = ___ -3
5 6 8
6(3x-1) 5(5x+1) x+1
-------- - --------- = ----------- - 3
30 30 8
18x-6 - 25x-5 x+1
------------------ = ----------- - 3
30 8
-7x-11 x+1
-------- = ------------ - 3
30 8
8(-7x-11) 30( x+1)
-------- - ------------ = - 3
240 240
-56x - 88 - 30x -30
--------------------- = -3
240
-86x-118
----------- =-3 / *240
240
-86x-118= -720
-86x=-720+118
-86x=-602
x= -602 : -86
x=7
(x-1)² +7 > (x+4)²
x²-2x+1+7>x²+8x+16
x²-2x-x²-8x>-1-7+16
-10x>8
x> -8:10
x>8/10
x>⅘