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Andrews [41]
3 years ago
8

1. x² - 1 + y(y - 2x)​somebody plz help meeeeeeeeeeeeeeeeeeeeeee

Mathematics
2 answers:
Nostrana [21]3 years ago
5 0


Step1:Multiply each term in the parentheses by y.


Step2: calculate the product

lawyer [7]3 years ago
4 0

Answer:

{(x + y)}^{2}  - 1

Step-by-step explanation:

{x}^{2}  + y(y - 2x) - 1

{x}^{2}  +  {y}^{2}   - 2xy - 1

Using the identity (a - b)^2 here ,

{(x + y)}^{2}  - 1

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This requires us to find the number of permutations of 6 different bands taken 2 at a time:
6P2=\frac{6!}{(6-2)!}=30\ different\ votes.
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Traci plans to conduct a coin-flipping experiment to see if the probability of landing on "heads" or "tails" is close to the the
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The experiment with the least number of trials.
 
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3 years ago
In figure find the area of the red part.​
larisa [96]

Step-by-step explanation:

Given : A rectangle 4 x 8 , a semicircle

Diagonal intersecting semicircle  

To Find :Area of red part

<h3>Solution:</h3>

Angle AC make AB   α = ∠BAC

tan α = BC/AB = 4/8 = 1/2

=> α = 26.565°

∠ECA = ∠BAC = α

EC = EF = 4

=> ∠CEF = 180° - 2α

∠AED = 45°  as   AE is  diagonal of Square of side  4

=> ∠AEF  + 180° - 2α + 45° = 180°

=>  ∠AEF =  2α - 45°  = 8.13°

in Left side area  between square  and circle is split in 2 Equal parts

(1/2) area - area AFG = area of Red part

in Left side area  between square  and circle  = 4² - (1/4)π4²

= 3.4336 sq unit

half  =  1.7168 sq unit  

Now find area AFG = area ΔAEF - sector EGF

area ΔAEF  

AE = 4√2  , EF = 4    angle = 8.13°

area ΔAEF   = (1/2) 4√2 * 4 sin 8.13° = 1.6 sq unit

area  sector EGF  = (8.13/360)π4² = 1.135  sq unit

area AFG  = 1.6 - 1.135  = 0.465 sq unit

Area of Red part = 1.7168 - 0.465 sq unit

= 1.2518 sq unit

= 1.252  sq unit

= 1.25 sq unit.

Hope this helps!!

5 0
2 years ago
Read 2 more answers
Approximately how many degrees are in the measure of an interior angle of a regular seven sided polygon
kramer
The interior angle of a regular polygon is equal to each other since all sides of the polygon are congruent. The formula that expresses the relation of the sides of the polygon and the measurement of the interior angle is (n2)*180/n where n is 7. Each interior angle then measures 128.6 degrees.
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3 years ago
Limit   
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Rationalize the numerator:

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This is continuous at x=0, so we can evaluate the limit directly by substitution:

\displaystyle\lim_{x\to0}\frac{\sqrt{x+4}-2}x=\lim_{x\to0}\frac1{\sqrt{x+4}+2}=\frac1{\sqrt4+2}=\frac14

5 0
3 years ago
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