For this case we must simplify the following expression:
[tex](9x ^ 2 + 10x + 4) - (9x ^ 2 + 5x-1)[/tex]
We eliminate the parentheses taking into account that:
[tex]- * + = -\\- * - = +\\9x ^ 2 + 10x + 4-9x ^ 2-5x + 1 =[/tex]
We add similar terms taking into account that:
Equal signs are added and the same sign is placed.
Different signs are subtracted and the major sign is placed.
[tex]9x ^ 2-9x ^ 2 + 10x-5x + 4 + 1 =\\5x + 5[/tex]
Answer:
[tex]5x + 5[/tex]
