Question

Brawa and are the series of gundeatic pasnomini x- kx + 15 such that Q17:) If a and Bare the zeroes of quadratic polynomiai x.kx + 15 such that (a + b)2 -2aß = 34, find k.

11th - 12th Class

Maths

Solution

4.0 (1 ratings)

( alpha beta=15 ) ( alpha+beta=k ) ( alpha^{2}+beta^{2}+2 alpha beta-2 alpha beta=34 ) ( alpha+B J^{2}-2 alpha B=34 ) ( alpha^{2}-30=34 ) ( operatorname{sos} x=8 )