(14-1/2x)²=36x 求x
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(14-1/2x)²=36x 求x
(14-1/2x)²=36x
1/4x²-14x+196=36x
1/4x²-50x+196=0
x²-200x+784=0
(x-196)(x-4)=0
x1=196 x2=4
(14-1/2x)²=36
14-1/2x=±6
28-x=±12
x=40 x=16
(14-1/2x)²=36x 求x
(14-1/2x)²=36x
1/4x²-14x+196=36x
1/4x²-50x+196=0
x²-200x+784=0
(x-196)(x-4)=0
x1=196 x2=4
(14-1/2x)²=36
14-1/2x=±6
28-x=±12
x=40 x=16