Lesson 3.8 use the quadratic formula and the discriminant
All radicals must be in simplest radical form. For the following equations, match the proper values for a b and c when the equations are written in standard form.
All radicals must be in simplest radical form. For the following equations, match the proper values for a b and c when the equations are written in standard form.
-
x^2 + 3x= 20
In standard form:
x^2 + 3x - 20 = 0
1*x^2 + 3*x - 20 = 0
Standard form of a quadratic equation:
a*x^2 + b*x + c = 0
So a = 1, b = 3, and c = -20
In standard form:
x^2 + 3x - 20 = 0
1*x^2 + 3*x - 20 = 0
Standard form of a quadratic equation:
a*x^2 + b*x + c = 0
So a = 1, b = 3, and c = -20
-
a is coefficient of x^2
b is coefficient of x
c is constant tertm.
x^2 + 3x = 20 ==> x^2 + 3x - 20 = 0
a = 1
b = 3
c = -20
b is coefficient of x
c is constant tertm.
x^2 + 3x = 20 ==> x^2 + 3x - 20 = 0
a = 1
b = 3
c = -20
-
a=1
b=3
c= -20
b=3
c= -20