Since 3 is a root of the quadratic equation kx²-7x+3=0, then k(3)²-7(3)+3=0
=> 9k-21+3=0 => 9k-18=0
=> 9k=18 => k= 2 Ans.
[If α is a root or zero of a quadratic equation P(x)=0, then P(α)=0]
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Rules for Solving a Linear Inequality <, >, ≤ and ≥ are known as signs or an inequality. Rule 1 If a positive number is added to both ...
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