How many unit tiles need to be added to the expression x^2 + 4x + 3 in order to form a perfect square trinomial

1 unit to be added

Step-by-step explanation:

we need to find what needs to added with the expression to make perfect square trinomial

we use completing the square method

LEts take x^2 + 4x

In completing the square method, we take the coefficient of x and divide it by 2. then we square it

4 divide by 2 is 2

2^2  = 4

So to make perfect square we need 4 at the end.

In the given expression we have +3, so we add 1 to get 4

step-by-step explanation:

-1/2 +2

step-by-step explanation: