Question

126 +15 - 3b2 in factorise​

Answer 1

Answer:

Step-by-step explanation:

Hey dear!

Here is yr answer......

=> 12b + 15 -3b²

=> -3b² + 12b + 15

=> -3b² + 15b - 3b +15

=> -3b(b-15) -3(b-15)

=> (b-15) (-3b-3)

Hope it hlpz....

Answer 2

Step-by-step explanation:

-3b^2+0b+141=0

3b^2=141

b^2=141/3

b^2=47

b=root3