Which of the equations are true identities? A. n3 + 3n² + 2n = n(n + 1)(n +2)
B. (a + 3)2 – 9 = a + 6a

Choose 1
Only A
Only B
Both A and B
Neither A nor B

a

b

d

step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

x = 23.78

step-by-step explanation:

i think the correct option is the second option.