Question
If a + b = 10 and ab = 6, then the value of a³ + b³
is:Solution
Given- a + b = 10, and ab =6 a2+b2 =100-12=88 now a³ + b³ =(a+b) (a2+b2-ab) =10(88-6) =10×82 a³ + b³ =820
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