Algebrahard · Past Paper
If the roots of x^2 - bx + c = 0 are two consecutive integers, then b^2 - 4c equals:
A0
B1
C2
D4
✓ Correct Answer: B — 1
Roots are n, n+1. Difference (α-β)^2 = 1. (α+β)^2 - 4αβ = b^2 - 4c = 1.
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✓ Correct Answer: B — 1
Roots are n, n+1. Difference (α-β)^2 = 1. (α+β)^2 - 4αβ = b^2 - 4c = 1.
Share this question