Q1 of 23 Page 1

Attempt any five of the following sub questions:

Verify whether 1 is the root of the quadratic equation


x2 + 3x – 4 = 0.

Put x = 1 in x2 + 3x – 4, we get

(1)2 + 3(1) – 4


= 1 + 3 – 4


= 0


∵ x2 + 3x – 4 = 0 on putting x = 1


∴ 1 is the root of the quadratic equation x2 + 3x – 4.


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