Medal for the Answer! Quadratic equations.

1.Solve by using the perfect squares method.

x2 + 4x + 4 = 0

2.Solve.

x2 – 5x – 6 = 0
3.What value should be added to the expression to create a perfect square?

x2 – 20x

Question

Medal for the Answer! Quadratic equations.

1.Solve by using the perfect squares method.
 
    x2 + 4x + 4 = 0

2.Solve.
 
    x2 – 5x – 6 = 0
3.What value should be added to the expression to create a perfect square?
 
    x2 – 20x

uri · Answer

Do you know the Quadratic formula?

uri · Answer

|dw:1376557413435:dw|
a:1
b:4
c:4

Plug in the values and solve