(5 + 2y)(y - 3) - (5 - 2y)2
First, distribute the terms inside the parentheses:
(5y - 15 + 2y^2 - 6) - (10 - 4y)
Now, simplify by combining like terms:
5y - 15 + 2y^2 - 6 - 10 + 4y= 2y^2 + 9y - 31
Therefore, the expression becomes:
2y^2 + 9y - 31
(5 + 2y)(y - 3) - (5 - 2y)2
First, distribute the terms inside the parentheses:
(5y - 15 + 2y^2 - 6) - (10 - 4y)
Now, simplify by combining like terms:
5y - 15 + 2y^2 - 6 - 10 + 4y
= 2y^2 + 9y - 31
Therefore, the expression becomes:
2y^2 + 9y - 31