﻿ If the pair of lines ax2 + 2hxy + by2 = 0 and a’x2 + 2h’xy + b’y2 = 0 have one line in common, then (ab’ – a’b)2 = : Kaysons Education

# If The Pair Of Lines ax2 + 2hxy + by2 = 0 And a’x2 + 2h’xy + b’y2 = 0 Have One Line In Common, Then (ab’ – a’b)2 =

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## Question

### Solution

Correct option is

Let the equation of the common line be mx. Then, it must satisfy both the given equations.

and,

which is the required condition.

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