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The product of two consecutive positive odd numbers is 143.
If the smaller is $x$ , then $x^{2} + 2 x - 143 = 0$ .
Find the smaller odd number.

Class 10The Quadratic FormulaAlgebra — Quadratics

A11
B22
C12
D10

Step-by-Step Solution

D = 4 + 572 = 576, D = 24. x = \frac{- 2 \pm 24}{2} = 11

or -13. Smaller positive = 11 (and 13).

Answer: A) 11

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