求x的值：x²-121/49=0
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求x的值：x²-121/49=0求x的值：x²-121/49=0求x的值：x²-121/49=0x²-121/49=0(x-11/7)(x+11/7)=0x=1
求x的值：x²-121/49=0
求x的值：x²-121/49=0
求x的值：x²-121/49=0
x²-121/49=0
(x-11/7)(x+11/7)=0
x=11/7或 -11/7
正负 11/7