Question

pls answer this with proper explaination pls

Answer 1

Answer:

option (1) 10b²

Step-by-step explanation:

4a²+5b²

+ (-4a²) + 5b²

=

4a²+5b²

-4a²+5b²

=

5b²+5b²(4a²-4a²=0)

=

10b²

Answer 2

(4a^2+5b^2)+(-4a^2+5b^2)

= 4a^2-4a^2+5b^2+5b^2

=10b^2

option 1