Question

need full solution .......plsss

Answer 1

FULL ANSWER WITH STEPS

$(3a+4)(2a-3)+(5a-4)(a+2)$
$= 6a^{2}-9a+8a-12+(5a-4)(a+2)$
$= 6a^{2}-a-12+(5a-4)(a+2)$
$= 6a^{2}-a-12+5a^{2}+10a-4a-8$
$= 6a^{2}-a-12+5a^{2}+6a-8$
$= 6a^{2}+5a^{2}-a+6a-12-8$
$= (6+5)a^{2}+(-1+6)a-20$
$= 11a^{2}+5a-20$
Here's your answer ! 

Hope this may help you. 

If you have any doubt, then you can ask me in the comments. 

Answer 2

(3a+4)(2a-3)+(5a-4)(a+2)
(6a²-9a+8a-12) + (5a²+10a-4a-8)
6a²-a-12+5a²+6a-8
6a²+5a²-a+6a-12-8
11a²+5a-20
If the answer is of equation than answer above is the right answer...