Równiania i nierówności
#1
#2
(2+x)(2-x)>4-4x-(16-8x+x²)
4-x²>4-4x-16+8x-x²
-x²+x²+4x-8x>4-16-4
-4x>-16 /: -4
x>4
4x²-4x+1+1=x²+3(x²-1)
4x²-4x+2=x²+3x²-3
4x²-x²-3x²-4x=-3-2
-4x=-5 /: -4
x=1,25
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#1
(2+x)(2-x)>4-4x-(16-8x+x²)
4-x²>4-4x-16+8x-x²
-x²+x²+4x-8x>4-16-4
-4x>-16 /: -4
x>4
#2
4x²-4x+1+1=x²+3(x²-1)
4x²-4x+2=x²+3x²-3
4x²-x²-3x²-4x=-3-2
-4x=-5 /: -4
x=1,25