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Gnesinka [82]
4 years ago
14

Find the points having x-coordinate of 9 whose distance from the point (3,-2) is 10.

Mathematics
1 answer:
kotegsom [21]4 years ago
3 0

\bf ~~~~~~~~~~~~\textit{distance between 2 points} \\\\ (\stackrel{x_1}{3}~,~\stackrel{y_1}{-2})\qquad (\stackrel{x_2}{9}~,~\stackrel{y_2}{y})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ \stackrel{d}{10}=\sqrt{[9-3]^2+[y-(-2)^2]}\implies 10=\sqrt{(9-3)^2+(y+2)^2} \\\\\\ 10=\sqrt{6^2+\stackrel{FOIL}{(y^2+4y+4)}}\implies 10^2=36+(y^2+4y+4)


\bf 100=y^2+4y+40\implies 0=y^2+4y-60 \\\\\\ 0=(y+10)(y-6)\implies y= \begin{cases} -10\\ 6 \end{cases} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill (9,-10)\qquad (9,6)~\hfill

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y = x^2-10x+25

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3 years ago
3x/x^ 2 - 6x = 1 . Solve for x.
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Answer:

Step-by-step explanation:

3x/x^ 2 - 6x = 1

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Using quadratic formula

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a = 6, b = 1 and c = -3

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X = (-1 + 8.54)/12 or (-1 - 8.54)/12

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y - y1 = m(x - x1)..using (1,3)
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