Answer:
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
X is 15because 15-10=5
x= 3*5
x=15
Answer:
There are 7 groups, with 4 people per group
Total number of people = 7 * 4
Equation is: number of groups * number of persons per group
Step-by-step explanation:
Answer:
20 slices
Step-by-step explanation:
Answer:
4x
+
5
y
=
15
Step-by-step explanation: