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tiny-mole [99]
3 years ago
8

COMPLETING THE SQUARE X^2– 2x +

Mathematics
1 answer:
Studentka2010 [4]3 years ago
6 0

Answer:

x^2 -2x + 1

Step-by-step explanation:

Think of a quadratic equation as

ax^2 + bx + c

x^2 -2x +

Comparing the two equations

a = 1 ,  b = -2,  c = ?

c becomes the missing part

Divide b by 2

-2/2 = -1

square the result

-1^2

= 1  this is what to add to get a perfect square

x^2 -2x + 1

(x - 1)^2

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Nvm I got it figured out .
Lesechka [4]
Well thats really great
5 0
3 years ago
Please help me with this question
Y_Kistochka [10]

Answer:

2(a - 4) + 5(b + 1) = 8. The result of this equation when solving is a = - 5b/2 + 11/2.

3(a - 1) - 2(b - 2) = -11. The result of this equation when solving is a = 2b/3 - 4.

Step-by-step explanation:

Hope this helps =)

8 0
2 years ago
Find all the missing elements:
pentagon [3]

Answer:

B = 34.2°

C = 58.2° or 121.8°

c= 10.6

Step-by-step explanation:

Step 1

Finding c

We calculate c using Pythagoras Theorem

c²= a² + b²

c = √a² + b²

a= 8, b = 7

c = √8² + 7²

c = √64 + 49

c = √(113)

c = 10.630145813

Approximately c = 10.6

Step 2

Find B

We solve this using Sine rule

a/sin A = b/sin B

A = 40°

a = 8

b = 7

Hence,

8/sin 40° = 7/sin B

8 × sin B = sin 40° × 7

sin B = sin 40° × 7/8

B = arc sin (sin 40° × 7/8)

B ≈34.22465°

Approximately = 34.2°

Step 3

We find C

Find B

We solve this using Sine rule

b/sin B = c/sin C

B = 34.2°

b = 7

c = 10.6

C = ?

Hence,

7/sin 34.2° = 10.6/sin C

7 × sin C = sin 34.2 × 10.6

sin C = sin 34.2° × 10.6/7

C = arc sin (sin 34.2° × 10.6/7)

C = arcsin(0.85)

C= 58.211669383

Approximately C = 58.2°

Or = 180 - 58.2

C = 121.8°

5 0
2 years ago
Read 2 more answers
Translate the following and then create real-world problems using these
elixir [45]
1. x - 6; Mark has 6 less dollars than Kim. Let x be the number of dollars Kim has.

2. 2(x/2); Robert lost half his money in the stock market last week, and then doubled that amount this week.

3. 4(x - 8); 4 people spent $8 on a movie. How much money (x) did each person have before seeing the movie?
5 0
3 years ago
Consider the equation 3x + 1 = 2x + 5
fomenos
You can’t technically solve it because there’s no question
3 0
3 years ago
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