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soldi70 [24.7K]
3 years ago
12

Find all points having an x coordinate of -3 whose distance from the point (-6,5) is 5

Mathematics
1 answer:
Scorpion4ik [409]3 years ago
3 0
Ok
distance formula

D=\sqrt{(x1-x2)^2+(y1-y2)^2}
given
distance between (-6,5) and (-3,y) is 5
5=\sqrt{(-6-(-3))^2+(5-y)^2}
5=\sqrt{(-6+3)^2+(5-y)^2}
5=\sqrt{(-3)^2+(5-y)^2}
5=\sqrt{9+y^2-10t+25}
5=\sqrt{y^2-10t+34}
square both sides
25= y^2-10t+34
minus 25 both sides
0= y^2-10t+9
factor
0=(y-9)(y-1)
set to zero
0=y-9
9=y

0=y-1
1=y

the points are (-3,1) and (-3,9)
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