4(-3) + 3(-5) + 7
-12+-15+7=-20
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
Answer:
actual product 5358
this answer is correct because the estimate is reasonable
estimate 280 x 20 = 5600
multiply 2 x 28 then add 2 zeros
Step-by-step explanation:
The answer actually is C. All of the angles in a rhombus must add up to 360.
75+75+115+115=360
X = 8
18+90 = 108
180-108=72
72/9=8
