Question

27(a+2b)^3+8(a-6b)^3 pls answer fast ​

Answer 1

Answer:

35a^3 + 18a^2b + 1188ab^2 - 1512b^3

Step-by-step explanation:

Step 1 :

Equation at the end of step 1 :

(27 • ((a + 2b)3)) + 8 • (a - 6b)3

Step 2 :

Equation at the end of step 2 :

27 • (a + 2b)3 + 8 • (a - 6b)3

Step 3 :

3.1 Evaluate : (a+2b)3 = a3+6a2b+12ab2+8b3

3.2 Evaluate : (a-6b)3 = a3-18a2b+108ab2-216b3

Checking for a perfect cube :

3.3 35a3+18a2b+1188ab2-1512b3 is not a perfect cube

Final result :

35a3 + 18a2b + 1188ab2 - 1512b3