Which of the following is a true polynomial identity? a. (x^2+1)(x^2-a)= x^4-ab. (x^2+1)(x^2+a)= x^2(x^2+a+1)c. (x^2+1)(x^2+a)-a = x^2(x^2+a+1)d. (x^2+1)(x^2+a)= x^2+ax^2+a

  c.  (x^2+1)(x^2+a)-a = x^2(x^2+a+1)

Step-by-step explanation:

You can use FOIL or the distributive property to expand the product of binomials, Then collect terms and factor out the common factor.

  (x^2+1)(x^2+a)-a

  = x^2(x^2 +a) +1(x^2 +a) -a

  = x^4 +ax^2 +x^2 +a -a

  = x^4 +ax^2 +x^2

  = x^2(x^2 +a +1) . . . . . matches choice C

hey there!

if she's saving for six months, let's divide the total number we need for the trip by six, dividing it into the amount that needs to be saved for each month.

500 ÷ 6 =

she needs to save at least this amount each month, so we should use this symbol: ≥

let x be the amount she saves each month.

your final answer is x ≥

hope this !

answer: $201

step-by-step explanation: to get the answer, you first get 3 nieces that he sold and multiply it by 67 and get $201, so he earned $201 selling his nieces.