Question

10. The sum of three algebraic expressions is 5x3 - 2x2 + 10x + 1. If two of the expressions are x3 - x2 + 5x + 7 and 2x3 - 3x2 + 7x - 9, find the third.​

Answer 1

Answer:

2x³ + 2x² -2x +3

Step-by-step explanation:

the expression is 5x³ - 2x² + 10x + 1

the other expression are x³ - x² + 5x + 7 and

2x³ - 3x² + 7x - 9

then 3rd expression is

5x³ - 2x² + 10x +1 - (3x³ -4x² + 12x -2)

=> 2x³ + 2x² -2x +3