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Solution


Q.

If one root of the equation 2x² – 10x + p = 0 is 2, then the value of p is:
1 -3  
2 -6  
3 9  
4 12  

Ans.

(4)

Since 2 is a root, 2(2)² – 10(2) + p = 0  ⇒  8 – 20 + p = 0  ⇒  p = 12