Question

Date
Page
The averano og o of a group of friena
is 18 veors To people aged
21 8 7S voor join th
make the av aroo go usb
numb og How
members were originally
goou
there
in theगायत्री शेष ऑफ ए ग्रुप आफ फ्रेंड्स ई सिटी न्यूज़ टू पीपल इज 21 एंड 25 स्टोर इन द ग्रुप मेकिंग द एवरेज ऑफ़ बॉय एंड इवन नंबर हाउ मेनी मेंबर्स वेयर ओरिजनली इन द ग्रुप ​

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.