janakisinghtha007 janakisinghtha007

18-04-2021
Mathematics

contestada

if y+z=4 and yz=3 then find y³+z³=?

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gayanepoghosyan gayanepoghosyan

18-04-2021

Answer is 28
y+z=4 => y=4-z
yz=3 => (4-z)z=3
=> z^2-4z+3=0
=> z=1 y=3 OR z=3 y=1
=>y^3 + z^3 =3^3+1=28

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