Question

A (15,4) and B is a point whose ordinate is thrice its abscissa. If AB is 13 cm, find the co-ordinates of B​

Answer 1

Answer:

Solution

The correct option is A

(1,2) or (3,6)

Let the coordinates of the point be P(x,2x). Let Q be the point (4,3).

PQ2=(4-x)2+(3-2x)2 = 10

16+x2-8x+9+4x2-12x=10

5x2-20x+15=0

x2-4x+3=0

(x-3)(x-1)=0

x=1 or x=3

So, 2x = 2 or 6

Hence, the coordinates of the required point are (1,2) or (3,6).

Step-by-step explanation:

Answer 2

Answer:

Above attachment is your answer.

Step-by-step explanation:

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