Mathematics · Pair of Straight Lines

Let PQR be a right-angled isosceles triangle, right-angled at Q(2, 1). If the equation of the line PR is 2x + y = 3, then the combined equation representing the pair of lines PQ and QR is:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

Correct answer

3x2 + 8xy - 3y2 - 20x - 10y + 25 = 0

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