Question

Which of the following is a solution of x2 + 2x + 8?

4 + i times the square root of 7
−1 + i times the square root of 7
1 + i times the square root of 7
−4 + i times the square root of 7

Answer 1

I hope this helps you


x^2+2x+8=0


x^2+2x+1+7=0


(x+1)^2= -7


(x+1)^2= i^2.7


x+1= i.square root of 7


x=-1+ i.square root of 7