Does any body know this?? plss help

What is the intermediate step in the form (x+a)^2 = b as a result of completing the square for the following equation?

Pepsi [2]

Assuming you are speaking of the Real Numbers…

x^2+66=14x+15

x^2 - 14x + ?? = -51

x^2 - 14x + (half of -14 squared) = -51 + (half of -14 squared)

x^2 - 14x + 49 = -51 + 49

(x - 7)^2 = -2

By the way, in the real number system, you can’t square any number and get a negative so the above equation has no solution. If you allowed for complex solutions…there would be two of those.

7 0

2 years ago

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Write the expression as the sine or cosine of an angle. Sin pi/3 cos pi/7 - sin pi/7 cos pi/3

Delicious77 [7]

The expression can be written as : sin(π/3 - π/7)

<h3>what are trigonometric functions?</h3>

Trigonometric functions are functions that gives the relationship between the sides and angles of a triangle.

some of the trigonometric functions are sine, cosine, tangent.

Analysis:

Let A = π/3

B = π/7

If sin(A-B) = sinAcosB - cosAsinB

then sinπ/3cosπ/7 - sinπ/7cosπ/3 = sin(π/3 - π/7)

Learn more about Trigonometry : brainly.com/question/24349828

#SPJ1

8 0

2 years ago

Point E is located at (2, −3), and point F is located at (−2, −1). Find the y-value for the point that is 3 over 4 the distance

12345 [234]

The ratio of the two point is the coordinate at the plane where the two point are divided at the fixed amount of length. The<em> y</em> value of the point that is 3/4 distance from point E to point F is -1.5. thus the option 4 is the correct option.

Given information-

The coordinates of the point E is (2,-3).

the coordinates of the point F is (-2,-1).

As the 3/4 the distance from the point E is the point F is means the points which divides the line EF in the ratio of 3/1.

<h3>Ratio of two point</h3>

The ratio of the two point is the coordinate at the plane where the two point are divided at the fixed amount of length.

Suppose the ratio $m:l$ are the ratio of the two points $(x_1,y_1)$ and $(x_2,y_2)$ . Then the coordinate of the point which divide the line at this ratio can be given as,