Since there are only 4 terms in the sum, it's not too much work to expand it as

Alternatively, we can use the well-known formulas


These sums start at n = 0, so in our given sum we will keep track of the 0-th term separately:

as expected.
<h2>Question: Factor: 4x2 + 4x</h2>
Find the GCF.

Factor out the GCF.

Simplify each term in parentheses.

Hence, the answer is 4x(x + 1).
<h2 /><h2>Question: Expand: -(x - 3) </h2>
Remove parentheses.

Regroup terms.

Therefor, the answer is 3 - x.
Answer:
area is equal to 198 cm^2
Step-by-step explanation:
the height h of the left triangle can be obtained by
Pytagoras theorem:

the, the area of the left triangle is

the area of the right triangle is

and the area of the rectangle in the middle is

Por tanto, el area total sera

Answer:
-1/2x+1 is the equation.
Step-by-step explanation:
Answer:
though this looks difficult. It's easier than you think. Just not visible until its visible. If I knew the answer, i would have told you... sorry.