The sides of a triangle are in the ratio 3:4:5. If the perimeter is 24 cm, what is the length of the longest side?

Explanation To factorize the expression y^2 + y – 6, we need to find two numbers whose product is -6 and whose sum is 1 (the coefficient of the middle term). These numbers are 3 and -2, so we can write: y^2 + y – 6 = (y + 3)(y – 2)