Question

627_saive the given pair of linear equations by using elimination
दिर लार समीकरणों को विलो पन विधि द्वारा हल करें :-
ci 3x+4y=10 x-y =
(ii) 241+3y = 8 and 4x+ 5y = 8
method :-
(2x2=4)
and
Cente​

Answer 1

Answer:

This implies that

x2+2ax=4x−4a−13

or

x2+2ax−4x+4a+13=0

or

x2+(2a−4)x+(4a+13)=0

Since the equation has just one solution instead of the usual two distinct solutions, then the two solutions must be same i.e. discriminant = 0.

Hence we get that

(2a−4)2=4⋅1⋅(4a+13)

or

4a2−16a+16=16a+52

or

4a2−32a−36=0

or

a2−8a−9=0

or

(a−9)(a+1)=0

So the values of a are −1 and 9.