Math, asked by aroranalin1607, 1 month ago

if a+b=8 and a^2+b^2=4 find a^3+b^3

Answers

Answered by arfaq1980jk
2

Answer:

320

Step-by-step explanation:

first find ab

formula ......

a²+b² = (a+b)²-2ab

4 = (8)²- 2ab

4 = 64-2ab

2ab = 64÷4

ab = 8

then in last we find a³+b³

formula for +

# + = (a+b)³-3ab(a+b)

+ = (8)³-3(8)×8

= 512-192

+ = 320

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