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Dane są zbiory A=<-2;∞), B=<-6;10>, C=(-∞;2). Wyznacz
C - (A∧B)=(-∞;2)-<-2;10>=(-∞;-2)
2.
x√5 + 3 = 10x - √5
x√5 -10x= - √5
x(√5 -10)= - √5 - 3 /: (√5 -10)
x=(- √5 - 3)/(√5 -10)
x=[(- √5 - 3)](√5 + 10)/[(√5 -10)(√5 + 10)]
x=(- 5-10√5-3√5-30)/(5-100)
x=(- 35-13√5)/(-95)
x=(35 + 13√5)/95
3.
W=(2-√2)³ + (3-√2)(3+√2) - 2(3√2-3)² = 8-12√2+12-2√2+ 9-2-2(18-18√2+9)=8-12√2+12-2√2+ 9-2-36+36√2-18=22√2-27
4.
W(x) = -36x² + 12x - 1=-(36x²-12x+1)=-[(6x)²-12x+1]=-(6x-1)²=-(6x-1)(6x-1)