Question

15. If a + 1/a =17/4
find the value of (a-1/a)​

Answer 1

Answer:

${a}^{2} + 1 = 17a \div 4 \\ (4a - 1)(a - 4) = 0 \\ a = 1 \div 4 \\ a = 4 \\ (a - 1 \div a) \\ (1 \div 4 ) - 4 \\ - 15 \div 4 \\ \\ 15 \div 4$