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Marrrta [24]
3 years ago
5

Write the absolute value equation if it has the following solutions. Hint: Your equation should be written as |x−b| =c. (Here b

and c are some numbers.) Chapter Reference b Two solutions: x=2, x=12.
Mathematics
1 answer:
Over [174]3 years ago
6 0
<h2>Answer</h2>

|x-7|=5

<h2>Explanation</h2>

We know that we need to write our absolute value equation as |x-b|=c. We also know that the solutions must be x=2 and x=12. We need to replace those values for x in our absolute value equation, so we can create a system of equations and find the values of  b and c.

- For x=2

|x-b|=c

|2-b|=c equation (1)

- For x=12

|x-b|=c

|12-b|=c equation (2)

Now we can solve our system of equations step-by-step:

Step 1. Replace equation (1) in equation (2)

|12-b|=|2-b|

Step 2. Square both sides of the equation to get rid of the absolute values

|12-b|=|2-b|

(12-b)^2=(2-b)^2

Step 3. Use the square of a binomial formula: (a-b)^2=a^2-2ab+b^2 and solve the equation.

For our first binomial, (12-b)^2, a=12 and b=b; for our second binomial, (2-b)^2, a=2 and b=b

(12-b)^2=(2-b)^2

12^2-(2)(12)(b)+b^2=2^2-(2)(2)(b)+b^2

144-24b+b^2=4-4b+b^2

144-24b=4-4b

140=20b

b=\frac{140}{20}

b=7 equation (3)

Step 4. Replace equation (3) in equation (2) to find the value of c

|12-b|=c

|12-5|=c

|7|=c

c=7

Putting it all together we can conclude that our absolute value equation is |x-7|=5

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