(5y2-4y)+ (2Y2+6Y-9)
(5y2-4y)+ (2Y2+6Y-9)
7y^2 + 2y - 9
To simplify the expression (5y^2-4y)+(2y^2+6y-9), you need to combine like terms. Like terms have the same variable and exponent.
First, let's combine the terms with a y^2:
5y^2 + 2y^2 = (5+2)y^2 = 7y^2
Next, let's combine the y terms:
-4y + 6y = (-4+6)y = 2y
Finally, combine the constants:
-9 remains as it is.
Putting it all together, the simplified expression is:
7y^2 + 2y - 9