Which equations are correct select each correct answer

The answer to your question is below

Step-by-step explanation:

a) -6y4 (4y2 + 2) = -24y6 -12y4         this equation is wrong

b)  -4x2 (2x2 + 5) = -8x4 -20x2         this equation is right

c) -4b3 ( 5b2 + 3) = -20b5 - 12b3       this equation is wrong

d) -5a4 ( 2a2 + 4) = -10a6 - 20a4       this equation is correct

Step-by-step explanation:

We need to find the correct statement out of given options.

Option (1) :

Using the identity,

The given option is wrong

Option (2) :

Using the identity,

It is correct option.

Option (3) :

Using the identity,

It is wrong option.

Option (4) :

Using the identity,

It is correct option.