Question

If (x+4) (x-7)(x-21)<0 then x €

Answer 1

Heya!

Here is ur answer...

(x+4) (x-7) (x-21) <0

(x+4)<0 => x <-4

(x-7)<0 => x < 7

(x-21)<0 => x < 21

Therefore,

x < -4

Hence, x€ {-4, -infinity}

Answer 2

$\huge\mathbb\red{Answer}$

(x+4) (x-7) (x-21) <0

(x-4) < 0

=> x<-4

(x-7) <0

=> x<7

(x-21) <0

=> x< 21

Therefore

x<-4

x€{-4, -infinity}

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