Question

a+b=6 then ab=8 find a cube + b cube ​

Answer 1

Answer:

a³+b³=72

Step-by-step explanation:

Hey mate!!!

(a+b)³ = a³+b³+3ab(a+b)

Substituiting what we know:

6³=a³+b³+24(6)

216-144=a³+b³

a³+b³=72

Therefore a³+b³=72

Hope this helps!!!!

Thanks!!!!

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Answer 2

Answer:

If a+b=6 and ab=8,

then,a=4

b=2

(a+b)³=a³+b³+3ab(a+b)

As we know a=4,b=2

So, 4³+2³+3(4)(2)(4+2)

=64+8+24(6)

=216

Hope it helps.