Question

10(3x-4÷x)^2-3(3x-4÷x)-7​

Answer 1

Let, (3x-4÷x) = A

now,

10 A^2 - 3A - 7

= 10 A^2 - (10-7)A - 7

= 10 A^2 -10 A + 7A - 7

= 10A (A-1) + 7 (A-1)

= (A-1) (10A+7)

= (3x-4÷x -1) {10 (3x-4÷x) +7}