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soldi70 [24.7K]
2 years ago
6

Solve x2 − 8x + 5 = 0 using the completing-the-square method. (2 points)

Mathematics
1 answer:
RoseWind [281]2 years ago
8 0

Answer:

x = 4 +  \sqrt{11},  \:  \: x = 4 -  \sqrt{11}

Step-by-step explanation:

{x}^{2}  -8x + 5 = 0 \\  \\  {x}^{2}  - 8x +  {4}^{2}  =  - 5 +  {4}^{2}  \\  \\  {(x - 4)}^{2}  =  - 5 + 16 \\  \\  {(x - 4)}^{2}  = 11 \\  \\ x - 4 =   \pm \sqrt{11}  \\  \\ x = 4 \pm \sqrt{11}  \\  \\ x = 4 +  \sqrt{11}, \:  \: x = 4 -  \sqrt{11}

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22/29

Step-by-step explanation:

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Steps in multiplying fractions. Remember: finding common denominator is not necessary in multiplying fractions. 
Common denominators are only needed in adding and subtracting fractions.

14/15 * 5/2 

Step 1. Multiply the numerators.
14 * 5 = 70
Step 2. Multiply the denominators
15 * 2 = 30
Step 3. Simplify the fraction.
70/30 = 2 10/30 = 2 1/3      

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Steps in Dividing fractions.

24/60 ÷ 8/15

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Reciprocal of 8/15 is 15/8.

Step 2. Multiply the 1st fraction to the reciprocal of the 2nd fraction. Follow steps in multiplying fractions.

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Step 3. Simplify the fraction.
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4 0
3 years ago
||2x+1|+6|>=0 plz answer asap
nirvana33 [79]
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6 0
2 years ago
F(x)=−x 2−3x+3 find f(7)
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Answer:

22

Step-by-step explanation:

because i swiched the x's to the 7 and multipled

4 0
2 years ago
Read 2 more answers
Help with this please
zimovet [89]

Answer:

absolute value makes a number positive

so the fraction is

<u><em>7/10</em></u>

<u><em></em></u>

<u><em>or  seven over ten</em></u>

3 0
2 years ago
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