x^2-68x+256=0,求x的值,我总是算不对,

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x^2-68x+256=0,求x的值,我总是算不对,x^2-68x+256=0,求x的值,我总是算不对,x^2-68x+256=0,求x的值,我总是算不对,x^2-68x+256=0(x-64)(x-

x^2-68x+256=0,求x的值,我总是算不对,
x^2-68x+256=0,求x的值,我总是算不对,

x^2-68x+256=0,求x的值,我总是算不对,
x^2-68x+256=0
(x-64)(x-4)=0
x1=64 x2=4

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(x-64)(x-4)=0
x=64,x=4