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WINSTONCH [101]
3 years ago
7

Solve |z - 8| = 4 please

Mathematics
1 answer:
bezimeni [28]3 years ago
5 0

Answer:

4

Step-by-step explanation:


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Pls help i am on a timer
stich3 [128]

Answer:

x = 1 + \sqrt{2} \ \ or \ 1- \sqrt{2}

Step-by-step explanation:

Given;

x² - 2x - 1 = 0

Solve by completing the square method;

⇒ take the constant to the right hand side of the equation.

x² - 2x = 1

⇒ take half of coefficient of x = ¹/₂ x -2 = -1

⇒ square half of coefficient of x and add it to the both sides of the equation

x^2 +  (-1)^2 = 1 + (-1)^2

(x-1)^2 = 1 + 1\\\\(x-1)^2 = 2\\\\

⇒ take the square root of both sides;

x-1 = +/- \ \ \sqrt{2} \\\\x = 1 + \sqrt{2} \ \ or \ 1- \sqrt{2}

Therefore, option B is the right solution.

3 0
2 years ago
Find the roots of the parabola given by the following equation <br> 2x^2+5X-9=2x
natta225 [31]

Answer:

x=-3\:or\:x=\frac{3}{2}

Step-by-step explanation:

The given parabola has equation

2x^2+5x-9=2x

We rewrite in standard form to obtain:

2x^2+5x-2x-9=0

2x^2+3x-9=0

Split the middle terms to get:

2x^2+6x-3x-9=0

Factor by grouping:

2x(x+3)-3(x+3)=0

(x+3)(2x-3)=0

x=-3\:or\:x=\frac{3}{2}

7 0
3 years ago
If someone can help me out :D!
Nataliya [291]
Hello

Answer:

28.378

Explanation:

8 0
2 years ago
Read 2 more answers
The united states mint released five state quarters every year. there are 50 states. How many years did it take for all 50
Gekata [30.6K]
You divide 50/5=10 years.
7 0
3 years ago
WHAT IS X IF THE EQUATION IS X - 3 = 6?
cestrela7 [59]

Answer:

9

Step-by-step explanation:

You substitute 9 for x and 9 - 3 = 6


I hope it helps! Have a great day!
Muffin ^^

4 0
2 years ago
Read 2 more answers
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