Mathematics

Question

If 2x2 – 13x + 20 = (2x – 5)(x – 4), which equation(s) should be solved to find the roots of 2x2 – 13x + 20 = 0? Check all that apply.

A. 2x – 5 = 0
B. x + 4 = 0
C. 2x – 5 = x – 4
D. 2x + 5 = 0
E. x – 4 = 0

2 Answer

  • 2x^2 – 13x + 20
    = (2x – 5)(x – 4)

    to find roots of 0 then 
    (2x – 5)(x – 4) = 0
    then (2x – 5) = 0 and (x – 4) = 0

    answer
    A. 2x – 5 = 0
    E. x – 4 = 0
  • Answer:

    Hence, the  correct options are:

    A. 2x-5 = 0

    and  E. x-4 = 0

    Step-by-step explanation:

    We are given a factorization of a polynomial function as:

    [tex]2x^2-13x+20=(2x-5)(x-4)[/tex]

    The roots of the equation are the possible value of x such that the polynomial function is zero at that point.

    i.e. we have to find x such that:

    [tex]2x^2-13x+20=0[/tex]

    which could also be written as:

    [tex](2x-5)(x-4)=0[/tex]

    Hence, the equation that satisfy this equation is:

    • [tex]2x-5=0[/tex]
    • [tex]x-4=0[/tex]

    Hence, the  correct options are:

    A. 2x-5 = 0

    and  E. x-4 = 0