4. The roots of (x – a) (x –b ) = ab x2 are always
The given equation is (ab – 1) x2 + (a + b) x – ab = 0 Disc. = (a + b)2 + 4 ab (ab – 1) = (a + b)2 – 4 ab + 4 (ab)2 = (a – b)2 + (2 ab)2 ≥ 0 for all a, b. roots are always real.
504 MCQ for effective preparation of the test of General of Mathematics section.
Read the MCQ statement: 4. The roots of (x – a) (x –b ) = ab x2 are always , keenly and apply the method you have learn through the video lessons for General to give the answer. Record your answer and check its correct answer and video explanation for MCQ No. 124-8856.