Question 51

Factorise $$x^{2}$$ + 3x ­-18

Solution

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Expression : $$x^2 + 3x - 18$$

= $$x^2 + 6x - 3x - 18$$

= $$x(x + 6) - 3(x + 6)$$

= $$(x + 6)(x - 3)$$

=> Ans - (C)

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