Expand the expression (5x-y)^3 using the binomial theorem

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers

How can (square root of 25) ^2 be rewritten?

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?