Question

$(x+2)^{2} +3(x-2)=(x+1)(x-1)-8$

nu face-ti copy-paste la raspuns :))

Answer 1

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Answer 2

x²+4x+4+3x-6=x²-1-8
7x=-9+2
7x=-7
x=-1
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Formule:
(a+b)²=a²+2ab+b²
(a+b)(a-b)=a²-b²