193k views
3 votes
Find the number that is one fifteenth of its one square

User Hakank
by
8.4k points

1 Answer

4 votes

Answer:

x = 5 OR x = 0. Either answer would be correct, but they may not give u the mark if you don't put both, so write like how i've done.

Explanation:

lets call unnamed number x.

so we know that x is 1/15 of x², or x = x²/15

that means that x² = 15x (rearranged)

rearrange to the form of ax² + bx + c = 0 (quadratic formula):

x² - 15x = 0

Factorise or use quadratic formula (factorised form shown):

(x - 5)(x ± 0) = 0 , which gives the x values to be:

x = 5 OR 0

User Chiragrtr
by
8.8k points

No related questions found