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im getting an error when using program.. compiles fine!

bobhahabobhaha Posts: 1Member
ok i made a program which works out x from a quadratic formula when you enter values for a, b and c (which are "real" numbers) it puts the numbers in an equation but it does not work! it compiles fine.. but when i try using the program it says ERROR 207: invalid floating point operation

This is the line of code that it points too

x:=-b+sqrt(((b*b)-(4*a*c))/2*a);

i think its got something to do with all the operations happening in one line.. do you think this is a problem? also is there supposed to be any statement under "uses" (eg uses crt;)so i can use the sqrt operation?

Thanks in advance!

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