Algebramedium · Past Paper
The equation x^2 + x - 1 = 0 has roots that are:
ARational
BIrrational
CImaginary
DEqual
✓ Correct Answer: B — Irrational
D = 1^2 - 4(1)(-1) = 5. Since 5 is positive but not a perfect square, roots are real and irrational.
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