Question

add: 3x²+5y² and 2x²-2y²+4y²

Answer 1

5xsquare +7y square is answer

Answer 2

Here is your solution

we have to add the term.

$= 3x {}^{2} + 5y {}^{2} +( 2x {}^{2} - 2y {}^{2} + 4y {}^{2} ) \\ = 3x {}^{2} + 5y {}^{2} + 2x {}^{2} - 2y {}^{2} + 4y {}^{2} \\ = 5x {}^{2} +7y {}^{2}$

Hope it helps you