Question

if 2x+3y+4=0 and ax+by+2=0 are identical, then 3a-2b=​

Answer 1

Answer:

multiply 2nd equation by 2

2ax + 2by + 4 = 0.

since equation are identical

2a = 2, therefore a = 1

2b = 3, therefore b = 3/2

now, 3a - 2b

= 3(1) - 2(3/2)

= 3 - 3

= 0.