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If one root of $x^{2} - 5 x + c = 0$ obtained from the formula is 2,
what is the value of $c$ ?

Class 10The Quadratic FormulaAlgebra — Quadratics

A6
B5
C7
D12

Step-by-Step Solution

If

x = 2

is a root:

4 - 10 + c = 0 \Rightarrow c = 6

. (Then

D = 25 - 24 = 1

, roots 2 and 3.)

Answer: A) 6

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