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when factoring, if it is not a perfect square trinomial, you should first try the method

See below.

Step-by-step explanation:

The 'ac' method. here's an example:

Factor x^2 - x - 6.  

Compare with ax^2 + bx + c:

a = 1 and c = -6 so ac = -6.

b = -1 so we try  -6 = -3 *  2:

x^2 - x - 6

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

Factor by grouping.

= x(x - 3) + 2(x - 3)

= (x + 2)(x - 3).

it is only things thain can be deafeated

step-by-step explanation:

answer is  

c.

36

step-by-step explanation: