Question

please explain it fast​

Answer 1

Answer:

4asquare - b square + 6y +9 = 0

4a square -b square + 6y = -9

squaring both side

2a - b + 6y = 9

2a - 2b + 3b + 6y =9

2(2b-3b)+ 6(2b-3b) = 9

(2+6) + (2b - 3b) = 9

8+ (2b-3b) = 9

2b - 3b = 1

(2-3)b = 1

-1b = 1

-b = 1

b = - 1

there fore b = -1