If x + y = 12 and xy = 27, find the value of x^3+y^3

756

Step-by-step explanation:

Using the algebraic identity

a³ + b³ = (a + b)³ - 3ab(a + b)

Thus

x³ + y³ = (x + y)³ - 3xy(x + y) ← substitute given values

           = 12³ - 3(27)(12)

           = 1728 - 972

           = 756

answer

explanation

the area of a circle is calculated using the formula

or

we can use any of the above formulae to calculate the required. preferably, let us use the latter since the diameter is

we substitute the diameter into the formula to get:

this is the exact value for the area of the circle.

the correct answer is a

the answer is y = 11.54

hope this : )