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### Section 2-7 : Quadratic Equations : A Summary

For problems 1 – 4 use the discriminant to determine the type of roots for the equation. Do not find any roots.

1. $$169{x^2} - 182x + 49 = 0$$ Solution
2. $${x^2} + 28x + 61 = 0$$ Solution
3. $$49{x^2} - 126x + 102 = 0$$ Solution
4. $$9{x^2} + 151 = 0$$ Solution