Question

Find the value of a3 -27b3 if a - 3b =( -6) and ab = (-10)

Answer 1

Answer:

-36

Step-by-step explanation:

Since, a^3 - b^3 = (a - b)^3 + 3ab(a - b)

Therefore, a^3 - 27b^3 = ( a - 3b)^3 + 3ab(a - 3b)

[As a^3 - 27b^3 = (a - 3b)^3]

= (-6)^3 + 3*-10(-6)

= -216 + 180 = -36

Hope this is the correct answer... pardon me for the explanation ... U may ask if anything is not clear...