The difference between two numbers is 5 and
their product is 14. Find the difference between
their cubes.
Answers
Answered by
2
Step-by-step explanation:
let the no are x and y.
x - y =5
xy=14
according to problem.....
x^3-y^3 = (x-y) (x^2 + y ^2 +xy)
= (x-y)^2 = x^2 +y^2 -2xy
25 = x^2 +y^2 -2×14
x^2 + y^2 = 25-28 =-3
so, x^3 - y^3= (5)(-3+14)
= 5×11
=55
hope it will help u
Answered by
2
Answer:
let the one no.be x and the other no.be y
according to question.....
x-y=5..............1
xy=14.............2
from eqation 1....
x=5+y×y=14
5+y square=14
y square=9
y=3........3
substitute the value of y in eq.1
x-3=5
x=8
find-x cube-y cube
8×8×8-3×3×3
512-27=485..........
495 is your answer.....
plrase mark as a brainlist answer....
substitute the value of x in equation 2...
Similar questions