Question 79887
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.