if da diff of da roots of da eq ax² -bx +c =0 is equal to the diff of ad roots of da eq x² -cx+b=0 and b is not equal to c then b+c =

a)0      b)2       c)4             d)-4

b + under root b²-4ac/2a -( b-under root b²-4ac/2a = under root b²-4ac/a

c + under root c²-4b/2 -(c-under root c²-4b/2

equate both u will get

c²-4b= b²-4ac/a

ac²-4ab=b²-4ac

a(c²-b)²=4a(b-c)

a(c-b)(c+b)=4a(b-c)

-a(b-c)(b+c)=4a(b+c)

b+c=-4

hence we get b+c=-4

rate if useful