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3 years ago

Find all points having an x-coordinate of 2 whose distance from the point (-1,-2) is 5

1 answer:

3 0

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\\\\
5=\sqrt{(-1-2)^2+(-2-y_1)^2}\\
\sqrt{9+4+4y_1+y_1^2}=5\\
y_1^2+4y_1+13=25\\
y_1^2+4y_1-12=0\\
y_1^2+6y_1-2y_1-12=0\\
y_1(y_1+6)-2(y_1+6)=0\\
(y_1-2)(y_1+6)=0\\
y_1=2 \vee y_1=-6\\\\
\boxed{(2,2),(-6,2)}

$

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42 minutes is the median amount of time

Step-by-step explanation:

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3 years ago

Solve the equation: 2x=4

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Answer:

x=2

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ruslelena [56]

Parameterize the path $\mathcal C$ by

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3 years ago

Factor completely 4x^2 + 3x - 10.

spin [16.1K]

4x²+3x-10

= 4x² + 8x -5x - 10
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Option C

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