SOLUTION: Can you please help me: a^2+4a+21 please help me solve this

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Question 79887: Can you please help me: a^2+4a+21 please help me solve this
Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
A^2+4A+21 USING THE QUADRATIC EQUATUION WE GET:
X=(-4+-SQRT[4^2-4*1*21])/2*1
X=(-4+-SQRT[16-84])/2
X=(-4+-SQRT-68)/2
X=(-4+-8.246i)/2
X=(-4+8.246i)/2
X=-2+4.123i ANSWER.
X=(-4-8.246)/2
X=-2-4.123i ANSWER.