1) x²+7x²=0
8x²=0
x=0
2) x²(x-2)+2(x-2)= 0
(x-2)(x²+2)=0
x=2
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1) x²+7x²=0
8x²=0
x=0
2) x²(x-2)+2(x-2)= 0
(x-2)(x²+2)=0
x=2