Ask Question
23 September, 03:42

Show all work to solve

3x^2 - 5x - 2 = 0

+3
Answers (1)
  1. 23 September, 06:28
    0
    Factor and set each factor equal to zero.

    x = 2, - 1/3

    Explanation:

    The first term is, 3x2 its coefficient is 3.

    The middle term is, - 5x its coefficient is - 5.

    The last term, "the constant", is - 2

    Step-1 : Multiply the coefficient of the first term by the constant 3 • - 2 = - 6

    Step-2 : Find two factors of - 6 whose sum equals the coefficient of the middle term, which is - 5.

    -6 + 1 = - 5 That's it

    Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, - 6 and 1

    3x2 - 6x + 1x - 2

    Step-4 : Add up the first 2 terms, pulling out like factors:

    3x • (x-2)

    Add up the last 2 terms, pulling out common factors:

    1 • (x-2)

    Step-5 : Add up the four terms of step 4:

    (3x+1) • (x-2)

    Which is the desired factorization

    Equation at the end of step 2:

    (x - 2) • (3x + 1) = 0
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Show all work to solve 3x^2 - 5x - 2 = 0 ...” in 📘 Mathematics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers