Sum to n terms series 2.3+3.4+4.5+…

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x