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I want to make the quadratic equation in C++ using only a,b, and c as the variables, using mostly parenthesis, but i'm not getting the correct answers.

root1 = ((-1*b) + (std::sqrt((b*b) - (4*a*c)))) / 2*a;
root2 = ((-1*b) - (std::sqrt((b*b) - (4*a*c)))) / 2*a;
user4581301
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Daniel Vayman
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1 Answers1

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In 

root1 = ((-1*b) + (std::sqrt((b*b) - (4*a*c)))) / 2*a;

the 2*a winds up dividing everything by 2 and then multiplying by a. Some brackets will fix that.

root1 = ((-1*b) + (std::sqrt((b*b) - (4*a*c)))) / (2*a);
user4581301
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