Verified Solution Mathematics Quadratic Equations

If the equation (m-1)x² - 2(m-1)x + 1 = 0 has equal roots, then find m.

9 views 2 helpful Updated Jul 14, 2026
Solution ✔ Verified
  • A0
  • B1
  • C2
  • D-1
Explanation

For equal roots, the discriminant D must be 0. D = [-2(m-1)]² - 4(m-1)(1) = 0. This simplifies to 4(m-1)² - 4(m-1) = 0. Factoring gives 4(m-1)(m-1-1) = 0, or 4(m-1)(m-2) = 0. This yields m=1 or m=2. If m=1, the equation reduces to 1=0, which is not a quadratic equation. Therefore, m=2.

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