Question

Subtract. (8y + y2 + 7y + 9) - (y2 + 3)​

Answer 1

`\boxed{ \bold{ \huge{ \boxed{ \sf{15y + 6}}}}}`

Explanation:

`\sf{(8y + {y}^(2) + 7y + 9) - ( {y}^(2) + 3)}`

When there is a ( - ) in front of an expression in parentheses, change the sign of each term

`\dashrightarrow \sf{8y + {y}^(2) + 7y + 9 - {y}^(2) - 3}`

Since two opposites add up to zero, remove them from the expression

`\dashrightarrow{ \sf{8y + 7y + 9 - 3}}`

Add the like terms : 8y and 7y

`\dashrightarrow{ \sf{15y + 9 - 3}}`

The negative and positive integers are always subtracted but posses the sign of the bigger integer

`\longrightarrow{ \sf{15y + 6}}`

Hope I helped!

Best regards! :D