Factorize \(9p^2 - q^2 + 6qr - 9r^2\)
Solve the equation: \(y - 11\sqrt{y} + 24 = 0\)
A man invested a sum of N280.00 partly at 5% and partly at 4%. if the total interest is N12.80 per annum, find the amount invested at 5%
