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BabaBlast [244]
3 years ago
13

What are the value of x in the equation x^2+4-1 =0

Mathematics
2 answers:
melomori [17]3 years ago
5 0

Answer:

x = ±sqrt(3) i

Step-by-step explanation:

x^2+4-1 =0

Combine like terms

x^2 +3 = 0

Subtract 3 from each side

x^2 +3-3 = 0-3

x^2 = -3

Take the square root of each side

sqrt(x^2) = sqrt(-3)

x = ±sqrt(3) sqrt(-1)

x = ±sqrt(3) i

andrew-mc [135]3 years ago
5 0

Answer:

x = √3 Or 1.73

Step-by-step explanation:

x² + 4 - 1 = 0

combine like terms

x ² + 3 = 0

subtract 3 from both side

x ² + 3 - 3 = 3

x ² = 3

Take square root of both side

√x² = √ 3

x = √3

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Daniel wrote the following two-column proof for the given information.
Pavel [41]

The information given about the proof does that Daniel made an error on line 2.

<h3>How to illustrate the information?</h3>

Given:

1. AB = 3x +2;  BC = 4x + 8;  AC = 38

2. AB + BC = AC      incorrect (not an angle angle addition postulate)

3. 3x+2 + 4x + 8 = 38         correct

4. 7x + 10 = 38                    correct

5. 7x = 28                           correct

6. x = 4

Daniel made an error on line 2.

Here is the complete question:

Daniel wrote the following two-column proof for the given information. Given: AB = 3x + 2; BC = 4x + 8; AC = 38 Prove: x = 4 Statements Reason 1. AB = 3x + 2; BC = 4x + 8; AC = 38 1. Given 2. AB + BC = AC 2. Angle Addition Postulate 3. 3x + 2 + 4x + 8 = 38 3. Substitution Property of Equality 4. 7x + 10 = 38 4. Combining Like Terms 5. 7x = 28 5. Subtraction Property of Equality 6. x = 4 6. Division Property of Equality On which line, did Daniel make his error? line 2 line 3 line 4 line 5

Learn more about proof on:

brainly.com/question/4134755

#SPJ1

8 0
1 year ago
NOWWWWWWWWWWWWWWWWWWWWWWWWWW PLZZZZZZZZZZ
sp2606 [1]

Answer:

147

Step-by-step explanation:

whoa chill

114+33=147

180-147=33

180-33=147

5 0
2 years ago
Which ratio forms a proportion with 7/4?<br><br>A. 49 <br>B.1512 <br>C. 25 <br>D. 36
Liono4ka [1.6K]
D


The andwer is d

D is yeh answer
4 0
3 years ago
The volume of each cone round the answer to decimal places
snow_tiger [21]

Answer:

1. 322.01

Step-by-step explanation:

Formula: v=pi X r^2(h/3)

4 0
2 years ago
4) Change the recurring decimal 0.18 to a fraction. (2marks)<br> You must show all your working.
yuradex [85]

Answer:

18/100 or 9/50

Step-by-step explanation:

First, put 0.18 over 100 because there are 2 digits in the decimal, so you convert it to 18/100. Then, simplify it, and because the GCF is 2, divide the numerator and denominator. The final fraction ins 9/50.

8 0
2 years ago
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