1.

Which of the following is the factor of x2 - 3x -18?1. (x + 9)2. (x - 6)3. (x - 2)4. (x - 3)

Answer» Correct Answer - Option 2 : (x - 6)

Given:

Factor of x2 -3x -18 =?

Concept used:

To find the factor of an algebraic expression, put the equation value as zero

Detailed solution:

x2 - 3x -18 = 0

⇒ x2 - 6x + 3x - 18 = 0

⇒ x(x - 6) + 3(x - 6) = 0

⇒ ( x + 3)(x - 6) = 0

∴ The factor of the expression x2 - 3x -18 is x - 6 and x + 3



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