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find the value of a cube + b cube when a+b = 5 and ab = 3

Sagot :

DᴀʀᴋPᴀʀᴀᴅᴏx

As we know :

  • [tex] \boxed{ \boxed{ {(a + b)}^{3} = {a}^{3} + {b}^{3} + 3ab(a + b) }}[/tex]

now let's plug the value of given terms :

  • (5)³ = a³ + b³ + (3×3)(5)

  • 125 = a³ + b³ + 45

  • a³ + b³ = 125 - 45

  • a³ + b³ = 80

Answer:

babawi lang sana

Step-by-step explanation:

naul pi

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