#14-Intro to Quadratic Formula

Is this quadratic equation in standard form? $3x^2-8x+5=2$  

• Yes

• No

• There is not enough information given.

Which step do you need to take to re-write the equation in standard form?
 $x^2-2x+9=4x$  

• Add 4x to both sides

• Subtract 4x to both sides

• Add 2x to both sides

• Subtract 2x from both sides

Tags

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.4

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

Identify the values of a, b, and c.
 $x^2+8x-3=0$  

•  $a=0,\ b=8,\ c=-3$  

•  $a=1,\ b=8,\ c=3$  

•  $a=1,\ b=8,\ c=-3$  

•  $a=0,\ b=8,\ c=3$  

Tags

CCSS.HSA.REI.B.4

Rewrite the equation in standard form
 $4x^2+8x-1=x^2-5$  

•  $3x^2+8x\ -6=0$  

•  $5x^2+8x+4=0$  

•  $5x^2+8x-6=0$  

•  $3x^2+8x+4=0$  

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

What is the correct value of b in the problem?
 $x^2+6x-16$  

Tags

CCSS.HSA.REI.B.4

Which answer shows the quadratic formula being plugged in correctly for the following problem?
 $x^2+6x-16=0$  

•  $\frac{\left(6\right)\ \frac{+}{-}\sqrt{\left(6\right)^2-4\left(1\right)\left(-16\right)}}{2\left(1\right)}$  

•  $\frac{-\left(6\right)\ \frac{+}{-}\sqrt{\left(6\right)^2-4\left(1\right)\left(16\right)}}{2\left(1\right)}$  

•  $x=\frac{-\left(6\right)\ \frac{+}{-}\sqrt{\left(6\right)^2-4\left(1\right)\left(-16\right)}}{2\left(1\right)}\$  

•  $\frac{\left(6\right)\ \frac{+}{-}\sqrt{\left(6\right)^2-4\left(1\right)\left(16\right)}}{2\left(1\right)}$  

Tags

CCSS.HSA.REI.B.4

Mark the 2 forms of the correct use of the quadratic formula for the following problem?
 $2x^2-7x+1=0$  

•  $\frac{\left(7\right)\ \frac{+}{-}\sqrt{\left(-7\right)^2-4\left(2\right)\left(1\right)}}{2\left(2\right)}$  

•  $\frac{-\left(-7\right)\ \frac{+}{-}\sqrt{\left(-7\right)^2-4\left(2\right)\left(1\right)}}{2\left(2\right)}$  

•  $\frac{-\left(7\right)\ \frac{+}{-}\sqrt{\left(7\right)^2+4\left(2\right)\left(1\right)}}{2\left(2\right)}$  

•  $\frac{-\left(7\right)\ \frac{+}{-}\sqrt{\left(7\right)^2-4\left(2\right)\left(1\right)}}{2\left(1\right)}$  

Tags

CCSS.HSA.REI.B.4

Identify a, b, and c from the following problem:
 $x^2-3x=18$  

•  $a=1,\ b=-3,\ c=18$  

•  $a=0,\ b\ =-3,\ c\ =18$  

•  $a=0,\ b\ =\ -3,\ c=-18$  

•  $a=1,\ b=-3,\ c=-18$  

Tags

CCSS.HSA.REI.B.4

What type of solution do you get if you end up with a negative under the square root sign?
For example:
 $\frac{5\ \frac{+}{-}\sqrt{-21}}{4}$  

• Positive Solution

• Negative Solution

• Both a positive and a negative solution

• Not Solution

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

CCSS.HSN.CN.C.7