Here are two steps from the derivation of the quadratic formula. x^2 + b/a x = - c/a
x^2 + b/a x + (b/2a)^2 = - c/a + (b/2a)^2
what took place between the first step and the second step?

Acircle has a circumference of 2 pi cm. which statement about the circumference and area is true? a comparison of the area and circumference is not possible since the area cannot be determined. the numerical values of the circumference and area of the circle are equal. the numerical value of the circumference is greater than the numerical value of the area. the numerical value of the circumference is less than the numerical value of the area.

Which three lengths could be the lengths of the sides of a triangle? 21 cm, 7 cm, 7 cm 9 cm, 15 cm, 22 cm 13 cm, 5 cm, 18 cm 8 cm, 23 cm, 11 cm

Can someone me out here and the tell me the greatest common factor