Question

2a - 3b = 3 and ab = 2, then find the value of 8a^3 - 27b^3. Please help me, with full procedure and steps. ​

Answer 1

Answer:

-94.5

Step-by-step explanation:

2a-3b=3 -----(i)

ab = 2----(ii)

b=2/a----(iii)

put (iii) in (ii)

2a - 3(2/a) = 3

2a - 6a = 3

-4a=3

-a=3/4

a=-3/4

then (iii)

b = 2(-0.75). [ •.• -3/4 = -0.75]

b= 1.5

=8(-0.75)³-27(1.5)³

=8(-0.422)-27(3.375)

=-3.376-91.125

=-94.5

Answer 2

Answer:

Step-by-step explanation:

Menai account to banaya but yaar vo chal hi nahi rha

hang ho rha hai

kuch bhi open nahi ho rha :(

You too have a great day bro ^_^