Ask Question
2 October, 02:56

The sum of a positive number and its square is 20. find the number.

+2
Answers (2)
  1. 2 October, 03:52
    0
    So x+x^2=20

    subtract 20 from both sdies

    x^2+x-20=0

    factor

    find what 2 nmbers multiply to get - 20 and add to get 1

    factors of 20=2 times 2 times 5

    the combos are

    2 times 10

    4 times 5

    1 times 20

    4 and 5 are 1 in diference

    5-4=1

    5 times 4=20

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

    if xy=0 then x and/or y=0

    set each to zero

    x-4=0

    add 4

    x=4

    x+5=0

    subtract 5

    x=-5

    but you want positive so this is an extranius answer so discard this

    the number is 4
  2. 2 October, 04:34
    0
    The answer is 4

    4 + 16 = 20
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “The sum of a positive number and its square is 20. find the number. ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers