x²+4x+4+1-x²=1
4x+5=1
4x=1-5
4x=-4/:4
x=-1
(a+b)²=a²+2ab+b²
(a+b)(a-b)=a²-b²
(a-b)(a+b)=a²-b²
(x+2)²+(1-x)(1+x)=1
x²+4x+4 + 1² - x² =1
4x = 1-5
4x=-4
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x²+4x+4+1-x²=1
4x+5=1
4x=1-5
4x=-4/:4
x=-1
(a+b)²=a²+2ab+b²
(a+b)(a-b)=a²-b²
(a+b)²=a²+2ab+b²
(a-b)(a+b)=a²-b²
(x+2)²+(1-x)(1+x)=1
x²+4x+4 + 1² - x² =1
4x = 1-5
4x=-4
x=-1