Respuesta :

metchelle
The number to be added in an expression x2 + 4x + 3 in order to make it as a perfect trinomial is 1, we need to add 1 to 3 to make it 4 since 4 is a perfect square. Thus, the equation is then x2 + 4x + 4 and the factor of it would bew (x+2)(x+2).

Answer:

We need to add 1.

Step-by-step explanation:

The given expression is :

[tex]x^{2} +4x+3[/tex]

We have to add 1 to the expression.

[tex]x^{2} +4x+3+1[/tex]

This makes it : [tex]x^{2} +4x+4[/tex]

And its factor will be [tex](x+2)(x+2)[/tex]

or we can write as : [tex](x+2)^{2}[/tex]

Therefore, we should add 1 unit tiles to the given expression in order to form a perfect square trinomial.