Question

x²+9x+20=0 find the value of x

Answer 1

Hey !!



X² + 9X + 20 = 0




X² + 5X + 4X + 20 = 0



X ( X + 5 ) + 4 ( X + 5 ) = 0



( X + 5 ) ( X + 4 ) = 0



( X + 5 ) = 0 OR ( X + 4 ) = 0


X = -5 or X = -4.

Answer 2

Factorise x^2 + 9x + 20 (By splitting method)

We will get (x + 4)(x + 5)

As,
x^2 + 9x + 20 = 0
Then,
(x + 4)(x + 5) = 0

If,
x + 4 = 0 × (x+5)
x+4=0
x=-4

x+5=0×(x+4)
x+5=0
x=-5

The value of x can be -4 and -5.

HOPE THIS WILL HELP U