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Masteriza [31]
3 years ago
14

What are the zeros of the function f(x) = x2 + 5x + 5 written in simplest radical form?

Mathematics
1 answer:
satela [25.4K]3 years ago
8 0

Step-by-step explanation:

x =  \frac{ - b +  -  \sqrt{ {b}^{2} - 4ac } }{2a}  \\ x =  \frac{ - 5 +  -   \sqrt{ {5}^{2} - 4(5) } }{2}  \\ x =  \frac{ - 5 +  -  \sqrt{25 - 20} }{2}  \\ x =  \frac{ - 5 +  -  \sqrt{5} }{2}

Therefore, the zeroes would be:

x1 =  \frac{ - 5 +  \sqrt{5} }{2}  \\ x2 =  \frac{ - 5 -  \sqrt{5} }{2}

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3 years ago
Which complex number is equivalent to the given expression?<br> (-45 - 22i) + 2(5 - 3i)(5 + 3i)
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Hint:

Use distributive property, then combine like terms.

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If you still are confused, then see below.

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4 0
3 years ago
What is x equal to ? 7x+3=2x-4
Amanda [17]
<h3><u>Explanation</u></h3>
  • Solve for x-term by making the x-term as the subject.

7x +3 = 2x - 4 \\ 7x - 2x =  - 4 - 3 \\ 5x =  - 7 \\ x =  \frac{ - 7}{5}  \longrightarrow -  \frac{7}{5}

  • Answer Check by substituting the value of x in the equation.

7 ( -  \frac{7}{5} )+ 3 = 2( -  \frac{7}{5} ) - 4 \\  -  \frac{49}{5}  + 3 =  -  \frac{14}{5}  - 4 \\  -  \frac{49}{5}  +  \frac{15}{5}  =  -  \frac{14}{5}  -  \frac{20}{5}  \\  -  \frac{34}{5}  =  -  \frac{34}{5}

The equation is true for the value of x. Therefore the answer is x = -7/5

<h3><u>Answer</u></h3>

<u>\large \boxed{x =  -  \frac{7}{5} }</u>

4 0
3 years ago
لیا
Mademuasel [1]

Answer:

18

Step-by-step explanation:

Because that's where it starts so it cant go before that, I hope that makes sense

<h3>hope it helps </h3>
7 0
3 years ago
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9:15 is also equal to 3:5
5 0
3 years ago
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