Question

(4a*2 -6ab + 9b-) (2a + 3b);

for verification:-
a = 2, b = 1​

Answer 1

Answer:

[4*2*2-6*2*1+9*1]-[2*2+3*1]

[16-12+9]-[4+3]

[13]-7=6

Step-by-step explanation:

Answer 2

Please refer to above attachment... ☺️