Question 78

Which of the following equations has 3 as a root?

Solution

(A) : $$x^{2}-7x+12 = 0$$

=> $$x^2 - 4x - 3x + 12 = 0$$

=> $$x(x - 4) - 3(x - 4) = 0$$

=> $$(x-4)(x-3) = 0$$

=> $$x = 3,4$$

=> Ans - (A)

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