Quadratic Equation

Which of the following is an example of quadratic equations?

• x + 9 = 0

• x + y =12

• x³ + 5x² - 14 =0

• x² - 2x = 7

What is the standard form of 9x - 16 = 3x - x²?

• x² +12x -16 = 0

• 2x² + 9x -16 = 0

• x² + 6x -16 = 0

• -x² + 6x - 16= 0

Solve by factoring: x²-6x+9=0

• x=3

• x=-3

• x=-4, x=-2

• Not factorable

Which is the correct formula for the quadratic equation?

• (x+9)(x-2)

• (x-9)(x-2)

• (x+9)(x+2)

• (x-9)(x+2)

 $7x^2=6x-1$  

Given this quadratic equation, what could be the values a, b, and c to use in the quadratic formula?

•  $a\ =\ 7,\ b\ =\ -6,\ c\ =\ 1$  

•  $a\ =\ 1,\ b\ =\ 6,\ c\ =\ -7$  

•  $a\ =\ -7,\ b\ =\ 6,\ c\ =\ 1$  

•  $a\ =\ 6,\ b\ =\ 7,\ c\ =\ 1$  

Solve using the Quadratic Formula:

2x² − x − 3 = 0

• $x=-\frac{3}{2},\ 1$

• $x=\frac{3}{2},\ -1$

• $x=-\frac{3}{2},\ -1$

• $x=\frac{3}{2},\ 1$

What do you do to the 'b' value to correctly complete the square?

• square it and then add the result to both sides

• divide by it 2, square the result, then add the result to both sides

• divide it by 2, take the square root of it and then add the result to both sides

• only divide it by 2 and add the result to both sides

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

Tags

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.4

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

• 1 and -12

• -1 and -9

• 1 and -9

• 1 and -1

Tags

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.4