How do you factor #2x^2-2x-84#?
2 Answers
Jun 25, 2016
Explanation:
when factorising you find a common multiple of all the digits. In this case we have
Double checking our work
Therefore =
Jun 25, 2016
2(x + 6)(x - 7)
Explanation:
Factor the trinomial in parentheses.
Find 2 numbers knowing their sum (b = -1) and their product (c = -42)
They are: 6 and -7.
Sum: 6 - 7 = -1
Product: 6(-7) = -42
y = 2(x + 6)(x - 7)