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Ghella [55]
3 years ago
14

use the discriminant to determine the number and type of solutions for the following equation x^2+10x+25=0

Mathematics
1 answer:
marta [7]3 years ago
6 0
There is 1 solution and it is x= -5
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In a class of 30 students, 12 are girls. What percent of the class is girls
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A teacher asked her students how many pets they own. Here
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2 years ago
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Natasha2012 [34]

As we know that the standard equation of circle is {\bf{(x-h)^{2}+(y-k)^{2}=r^{2}}} , where <em>r</em> is the radius of circle and centre at <em>(h,k) </em>

Now , as the circle passes through <em>(2,9)</em> so it must satisfy the above equation after putting the values of <em>h</em> and <em>k</em> respectively

{:\implies \quad \sf \{2-(-1)\}^{2}+(9-5)^{2}=r^{2}}

{:\implies \quad \sf (3)^{2}+(4)^{2}=r^{2}}

{:\implies \quad \sf 9+16=r^{2}}

After raising ½ power to both sides , we will get <em>r = +5 , -5</em> , but as radius can never be -<em>ve</em> . So <em>r = +</em><em>5</em><em> </em>

Now , putting values in our standard equation ;

{:\implies \quad \sf \{x-(-1)\}^{2}+(y-5)^{2}=(5)^{2}}

{:\implies \quad \bf \therefore \quad \underline{\underline{(x+1)^{2}+(y-5)^{2}=25}}}

<em>This is the required equation of </em><em>Circle</em>

Refer to the attachment as well !

8 0
2 years ago
(-1/9) ÷ 6/7 =<br><br> Help<br> Me<br> Pls<br> :)
german

Answer:

I believe your answer is -7/54

3 0
2 years ago
Read 2 more answers
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