Question

We can use the right outside diagonal of the empty Lacsap's triangle as the coefficients of a polynomial: $t^3 + 6t^2 + 12t + 8.$ If we replace every $t$ with $t-1,$ we get $(t-1)^3 + 6(t-1)^2 + 12(t-1) + 8.$Expand and simplify this polynomial. Enter the polynomial as your answer.

Answer 1

The given equation with t -1 is:
(t – 1)^3 + 6 (t – 1)^2 + 12 (t – 1) + 8

Expand each term before combining for easier visualization:
(t – 1)^3 = t^3 – 3 t^2 + 3t – 1
6 (t – 1)^2 = 6 t^2 – 12 t + 6
12 (t – 1) = 12 t - 12

Then substitute and combine:
-> t^3 – 3 t^2 + 3t – 1 + 6 t^2 – 12 t + 6 + 12 t – 12 + 8

t^3 + 3 t^2 + 3 t + 1 (ANSWER)