What is the sum of the squares of the roots of the equation x2 + 2x - 143 = 0?
Let the roots be α and β. So, sum of squares of roots = α2 + β2
Sum of roots = α + β = -b/a = -2
Product of roots = αβ = c/a = -143
α2 + β2 = (α + β)2 - 2αβ
= (-2)2 - (-143) = 290
The correct option is D.