Question

find the sum of 4x²+3xy-7y³ and 7x³+5xy-y³​

Answer 1

Writing the terms of the given expressions in the same order in form of rows with like terms below each other and adding column wise;

6a + 8b - 7c

- 4a + 2b + c

a - 3b - 2c

3a + 7b - 8c

= 3a + 7b - 8c

Like this process you have to do