2 years ago

Point B has coordinates (4,2). The x-coordinate of point A is - 1. The distance between point A and

Mathematics

1 answer:

Digiron [165]2 years ago

4 0

Answer:

A (-1,-10) ; A (-1,14)

Step-by-step explanation:

$\sqrt{(-1-4)^2 + (y-2)^2} = 13 \\ 25 + y^2 + 4 -4y = 169$

y^2 -4y - 140 = 0

Δ/4 = 4 + 140 = 144

y1 = 2 + 12 = 14

y2 = 2 -12= -10

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