Explanation:
2.1 Factoring 3x2-2x-23
The first term is, 3x2 its coefficient is 3 .
The middle term is, -2x its coefficient is -2 .
The last term, "the constant", is -23
Step-1 : Multiply the coefficient of the first term by the constant 3 • -23 = -69
Step-2 : Find two factors of -69 whose sum equals the coefficient of the middle term, which is -2 .
-69 + 1 = -68
-23 + 3 = -20
-3 + 23 = 20
-1 + 69 = 68