Which equations are correct -6^4(4y^2+2)=-24y^8-12y^4 -4x^2(2x^2+5)=-8x^4-20x^2 -4b^3(5b^2+3)=-20b^6-12b^3 -5a^4(2a^2+4)=-10a^6-20a^4

2nd, 3rd and 4th equations are correct.

Step-by-step explanation:

is right because each term inside is multiplied by -4x square and we find the answer is right.

Hence correctly done.

Correctly done.

should be the right answer.

But instead only 6 is multiplied by inner terms. Hence wrong.

I answer is wrong and others are right.

so far i think you have the right thing going for you just remember soh cah toh

step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse