For the value of x, we solve the given equation:-
169÷4845−27=1x21
⇒169×4548−27=21+x21 [Divide 48 by 16 we get 3 & 45 by 9 we get 5]
⇒53−27=21+x21
⇒35−621=21+x21 [cancle 21 both sides]
⇒29=21+x
⇒x=29−21=8
Hence,
x=8.
The complete set of values of 'a' such that x2+ax+a2+6a < 0 ∀ x ϵ [-1, 1] is: