Algebrahard · Past Paper
If roots are α and β, then 1/α^2 + 1/β^2 equals:
A(α^2 + β^2) / (αβ)^2
B(b^2 - 2ac) / c^2
C(b^2 + 2ac) / c^2
DBoth a and b
✓ Correct Answer: D — Both a and b
Simplifying 1/α^2 + 1/β^2 gives (α^2 + β^2) / (αβ)^2. Substituting coefficients gives (b^2 - 2ac)/c^2.
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