Which angles are corresponding angles

Option B, C, D are the correct options

Step-by-step explanation:

When two parallel lines are intersected by a transverse then two angle which are relatively at the the same position are called as corresponding angles.

As given in the picture attached, ∠1 and ∠2 are corresponding angles.

Similarly, ∠3 and ∠4 re corresponding angles.

Now we come to our question. In this question corresponding angles are

1) 2 and 4

2) 6 and 8

3) 1 and 3

4) 5 and 7

Therefore, Options. B, C and D are the correct options.

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1