Question

Question:

$\colorbox{blue}{ 4x + 5y }\colorbox{royalblue}{+5x-4y}$



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Answer 1

Answer:

4x+5y+5x-4y

Step-by-step explanation:

=4x+5x+5y-4y

=9x+1y

=9x+y

i hope it is helpful

Answer 2

Answer:

4x+5y+5y-4y=0

=> 9x + y = 0

=> x + y = 0

Step-by-step explanation:

Hi, Sagar

how are you?