Ask Question
29 January, 09:06

Find the solution (s) for x in the equation below. x^2 - 9x + 20 = 0

+3
Answers (2)
  1. 29 January, 10:08
    0
    x = 4, x = 5

    Step-by-step explanation:

    Given

    x² - 9x + 20 = 0

    Consider the factors of the constant term ( + 20) which sum to give the coefficient of the x - term ( - 9)

    The factors are - 4 and - 5, since

    - 4 * - 5 = + 20 and - 4 - 5 = - 9, thus

    (x - 4) (x - 5) = 0

    Equate each factor to zero and solve for x

    x - 4 = 0 ⇒ x = 4

    x - 5 = 0 ⇒ x = 5
  2. 29 January, 11:05
    0
    0

    Step-by-step explanation:

    Solve the equation x^2-9x+20=0. First, we need to factorise the equation on the left hand side, this can be done by finding two numbers that add together to make the 'b' coefficient (-9) and multiply to make the 'c' coefficient (20). This will give - 5 and - 4. Therefore, (x-5) (x-4) = 0.
Know the Answer?