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2 years ago

The value of x² – 2yx + y² when x = 1, y = 2 is

Mathematics

2 answers:

Mrrafil [7]2 years ago

7 0

7
The process
1-2(2x1)+(2)^2

ki77a [65]2 years ago

5 0

$x^2 - 2xy +y^2 = (x-y)^2 = (1-2)^2 = (-1)^2 =1$

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I request assistance on answering this question

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3 years ago

Please help!!!! 2 questions 50 points!!!!

Zielflug [23.3K]

Answer:

See below ~

Step-by-step explanation:

Question 1

The missing angles

Both the unknown angles have the same value as the other two angles in the triangles are the same
∠(missing) = 180 - (72 x 2)
∠(missing) = 180 - 144
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⇒ The sides are equal

⇒ Angles are not 90°

⇒ It is a rhombus

Question 2

The diagonals of the shape bisect other (Statement 1)
NY = NW (given)
XN = NZ (given)
∠XNY = ∠WXZ (vertically opposite angles)
ΔXNY ≅ ΔWXZ (SAS)
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2 years ago

Write an exponential function to represent a situation in which the initial value is 175 and the rate of decay is 20%

AleksAgata [21]

Answer:

Step-by-step explanation:

F(X)=(1/5)^T/175

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3 years ago

What is the value of 5n-3 when n=5?

joja [24]

Answer:

Step-by-step explanation:

We are given the expression:—

$\displaystyle \large{5n-3}$

When n = 5, substitute/change n to 5:—

$\displaystyle \large{5(5)-3}$

Evaluate:—

$\displaystyle \large{25-3=\boxed{22}}$

__________________________________________________________

Summary

Substitution

Changing or replacing from a term to another terms/expression is called substitution.

Examples:—

If we are given the expression $\displaystyle \large{2y-1}$ and we want to find the value when y = 4, simply replace y-term to 4.

$\displaystyle \large{2(4)-1=8-1=\boxed{7}}$

__________________________________________________________

If you have any doubts regarding my answer/explanation, do not hesitate to ask in comment!

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2 years ago

WILL MARK BRAINLIEST:

Aloiza [94]

Answer:

Step-by-step explanation:

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3 years ago

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