Answer:
(2a-1)^2
Step-by-step explanation:
Rewrite 4a^2 as (2a)^2
.
(2a)^2−4a+1
Rewrite 1
as 12
.
(2a)^2−4a+1^2
Check the middle term by multiplying 2ab
and compare this result with the middle term in the original expression.
2ab=2⋅(2a)⋅−1
Simplify.
2ab=−4a
Factor using the perfect square trinomial rule a^2−2ab+b^2=(a−b)^2
, where a=2a and b=−1
.
(2a−1)2
please brainly
Answer:
27
Step-by-step explanation:
hope this helps
Answer:
Your answer should be 647.51
Explanation : the price was 215.949 in December, 2009.
the price was 233.049 in December, 2013.
divide 233.049 by 235.949 and got 1.079185363.
multiply that by 600 and got 647.5112179.
Answer:
x^2+4x
Step-by-step explanation:
Use the Foil formula
If you know the center is at (-1,3), then find r by writing out the standard formula for the equation of a circle, as follows:
(x-2)^2 + (y-5)^2 = r^2
We still have the other point to deal with: (-4,1). Subst. -4 for x in this equation, and 1 for y:
(-4-2)^2 + (1-5)^2 = r^2. Then 36 + 16 = r^2,
and 52 = r^2, so that the radius is positive sqrt(52).
You could write that as sqrt(4)sqrt(13) = 2sqrt(13). Take your pick.