Question

3a-1/a=6, Find the value of a^2-1/9a^2

Answer 1

Answer:

the value of a^2-1/9a^2 = -8/9

Step-by-step explanation:

see the attachment

hope it helps you :)

Answer 2

Answer:

16/189

Step-by-step explanation:

shift a to left hand side

3a-1=6a

-1=6a-3a

a= -1/3

a²-1/9a² (a²-b² = (a+b)(a-b)

using the formula

(a+1/9a)(a-1/9a)

{-1/3+(1/9×-1/3)}{-1/3-(1/9×-1/3)}

(-1/3-1/27)(-1/3+1/27)

making the denominator same

multiply 7 to 3

(-7-1/27)(-7+1/27)

(-8/27)(-6/27)

(16/27×7)

16/ 189