What values are needed to make each expression a perfect square trinomial? x2 + 2x + x2 – 20x + x2 + 5x +

1) 1  2)100 3)6.25.

Step-by-step explanation:

Any  trinomial is of the form ax^2+bx+c .

To make the expression a perfect square we take half of b term then square it Add This is what we add to make the expression a perfect square.

1)Half of coefficient of x term is 1 .

Square it that is 1 is added to make it a perfect square.

2) Half of coefficient of x term that is 20÷2=10 .Square it that is 100 is added to make it a perfect square.

3) Half of coefficient of x that is 5÷2=2.5.Square it 6.25 is added to the expression to make it a perfect sqauare.