Question

if a + b =8 and ab = 12 find the value of a^3+b^3​

Answer 1

Answer:

224

Step-by-step explanation:

a + b = 8 |given|

ab = 12

•°• we know that

a³ + b ³ = (a + b ) ( a² + b² - ab )

and , ( a + b ) ²- 2ab = a² + b²

so , a³ + b³= ( a + b ){ ( a + b )² - 3ab }

hence , a³ + b³ = 8{8²- 3 ×12 } ✔ putting the given value

=> 8 { 64- 36}

=> 8×28

= > 224 Answer

a³ + b³ = 224 Answer

Answer 2

Answer:

answer is simple -it is 224... hope it helps