write the program to calculate real roots of quadradic equation with nested function.

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hi,i I'm pretty new in matlab .i wanna write the program to calculate real roots of quadradic equation with nested function.
function[x1,x2]= quadratic(a,b,c)
d=0
disc;
function disc
d = sqrt(b^2-4*a*c);
end
disc;
x1 =(-b + d)/(2*a);
x2 =(-b - d)/(2*a);
end
Error:File: quadratic2.m Line: 6 Column: 11
Identifier 'd' is not a function or a shared variable. To share 'd' with nested function, initialize it in the current
scope. For more information, see Sharing Variables Between Parent and Nested Functions.
i have no idea what should i do...

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Alan Stevens
Alan Stevens 2020년 12월 8일
You are over complicating things! All you need is
function[x1,x2]= quadratic(a,b,c)
d = sqrt(b^2-4*a*c);
x1 =(-b + d)/(2*a);
x2 =(-b - d)/(2*a);
end

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