Find the quadratic equation whose roots are c and -c

A trader bought 100 tubers at 5 for N350.00. She sold them in sets of 4 for N290.00. Find her gain percent.

Simplify 3\(\sqrt{27x^3y^9}\)

If p-2g + 1 = g + 3p and p - 2 = 0, find g

Simplify \(\sqrt{50} + \frac{10}{\sqrt{2}}\)

If x% of 240 equals 12, find x

P naira invested for 4 years invested for 4 years at r% simple interest per annum yields 0.36 p naira interest. Find the value of r

Evaluate \(\frac{(3.2)^2 - (4.8)^2}{3.2 + 4.8}\)

Simplify \(\frac{\frac{1}{x} + \frac{1}{y}}{x + y}\)