Question

4a + 3b = 10, ab = 2 , 64a3 + 27b3 = ?​

Answer 1

Answer: 4a + 3b = 10

               We will use TRIAL-AND-ERROR method.

               1. 4 x 1 + 3 x 2

                   = 4 + 6 is equal to 10

Thus, a = 4 and b = 6

Answer 2

Answer:

first cube both sides

(4a+3b)^3=(10)^3

64a^3+27b^3+3(4a)(3b) [4a+3b]= 1000

64a^3+27b^3+36ab(4a+3b)=1000

now... putting the values of

64a^3+27b^3+36(2)(10)=1000

64a^3+27^3+720=1000

64a^3+27b^3=1000-720

64a^3+27b^3=280

^3 means degree(power) of that number.