Question

if X + Y=5 and X Y=4 find X cube + y cube​

Answer 1

Step-by-step explanation:

x3+y³

(x+y)³

x³+y³+3ab=0

(5)³+3(4)=0

125+12=137 is the answer of this question

Answer 2

${\huge{\underline{\underline{\sf {\mathfrak{Answer}}}}}}$

${\underline{\underline{\rm {Given:}}}}$

• $x+y=5$
• )tex]xy=4[/tex]

${\underline{\underline{\rm {Solution:}}}}$

$\bigstar {\underline{\bf{By \ formula:}}}$

$(x+y)^3=x^3 + y^3 + 3xy(x+y)$

$5^3 = x^3 + y^3 + 3(4)(5)$

$125 = x^3 + y^3 + 60$

$\boxed{\implies{\boxed{x^3 + y^3 = 65}}}$