(x+1)3-(x+2)2=(x-1)3-5(2-x)(2+x)
3x+3-2x-4=3x-3-5(4-x²)
x-1=3x-3-20+5x²
x-1=3x-23+5x²
-2x+22=5x²
5x²+2x-22=0 |:5
x²+2/5x-22/5=0
x²+2/5x+1/25 -111/25=0
(x+1/5)²=111/25
x+1/5=√111 /5 lub x+1/5=- √111 /5
x=√111 /5 -1/5 x= -√111 /5 -1/5
:))
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(x+1)3-(x+2)2=(x-1)3-5(2-x)(2+x)
3x+3-2x-4=3x-3-5(4-x²)
x-1=3x-3-20+5x²
x-1=3x-23+5x²
-2x+22=5x²
5x²+2x-22=0 |:5
x²+2/5x-22/5=0
x²+2/5x+1/25 -111/25=0
(x+1/5)²=111/25
x+1/5=√111 /5 lub x+1/5=- √111 /5
x=√111 /5 -1/5 x= -√111 /5 -1/5
:))