13-(1-x^2)=4的解题步骤及解答过程

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13-(1-x^2)=4的解题步骤及解答过程13-(1-x^2)=4的解题步骤及解答过程13-(1-x^2)=4的解题步骤及解答过程13-(1-x^2)=41-x^2=13-4-x^2=13-4-1=

13-(1-x^2)=4的解题步骤及解答过程
13-(1-x^2)=4的解题步骤及解答过程

13-(1-x^2)=4的解题步骤及解答过程
13-(1-x^2)=4 1-x^2=13-4 -x^2=13-4-1=8 x^2=-8 x=2√2