Add:
2x3 – 9x2 + 8, 3x2 – 6x – 5, 7x3 – 10x + 1 and 3 + 2x – 5x2 – 4x3
Let’s arrange the data in a table in the form of descending power of x,
We will get rows and columns; add the data column wise;
So, the answer after adding all the expressions will be;
5x3 - 11x2 – 14x + 7