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Want to solve for x

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Mary Jean Savitsky
Mary Jean Savitsky 2020-4-10
关闭： MATLAB Answer Bot 2021-8-20
k=0.0023;
extent1=((100*x-2*x^2)/(1625-115*x+2*x^2))==k*(1);
solve (extent1,x)
I want to solve for x but when i input this I get the solution in the form of a formula instead of a number. How can I change is to that once it runs, the solution comes out in the form of a number
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James Tursa
James Tursa 2020-4-10
编辑：James Tursa 2020-4-10
E.g.,
>> syms x
>> k=0.0023;
extent1=((100*x-2*x^2)/(1625-115*x+2*x^2))==k*(1);
solve (extent1,x)
ans =
334215/13364 - (5*40092004761^(1/2))/40092
(5*40092004761^(1/2))/40092 + 334215/13364
>> double(ans)
ans =
0.0373
49.9799
Note that this is really just polynomial roots. E.g.,
>> roots([-2 100 0] - k*[2 -115 1625])
ans =
49.9799
0.0373

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回答（1 个）

Steven Lord
Steven Lord 2020-4-10
Call double or vpa on the output of solve.

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