Question

factorise x²+4x+20
plz solve it​

Answer 1

Answer:

x^2 + 4x + 20

First, look at the discriminant: b2 - 4ac = 16 - 80 = -64 (negative and therefore not factorable)

Can be solved by completing the square:

x^2 + 4x + 20

x^2 + 4x = -20

x^2 + 4x + 4 = -20 + 4

(x + 2)2 = - 16

x + 2 = ±4i

x = -2 ±4i

hope it will be help you

Answer 2

Answer:

(x+4)²

Step-by-step explanation:x²+4x+20

=>x²+(4+5)x+20

=>x²+4x+5x+20

=>x(x+4)+4(x+4)

=>(x+4)(x+4)

=>(x+4)²