Solve Quadratic Equations by Quadratic Formula

Determine the values of
a, b, and c for
the quadratic equation: 
4x² – 8x = 3

• a = 4, b = -8, c = 3
• a = 4, b =-8, c =-3
• a = 4, b = 8, c = 3
• a = 4, b = 8, c = -3

QUESTION 5

• A
• B 
• C 
• D 

Tags

CCSS.HSA-REI.B.4B

• A
• B
• C
• D

Tags

CCSS.HSA-REI.B.4B

Solve using the Quadratic Formula:
 $5x^2+3x-1=0$ 

•  $x=\frac{3\pm\sqrt{29}}{5}$  

•  $x=\frac{8}{5}\ or\ x=-\frac{2}{5}$  

•  $x=\frac{-3\pm\sqrt{29}}{10}$  

• No real solutions

Tags

CCSS.HSA-REI.B.4B

 $Solve\ for\ x:\ \ \ 4x^2\ +2x\ =1$  

•  $\left\{\frac{-1+\sqrt{5}}{4},\ \frac{-1-\sqrt{5}}{4}\right\}$  

•  $\left\{\frac{-2+2\sqrt{5}}{8},\ \frac{-2-2\sqrt{5}}{8}\right\}$  

•  $\left\{\frac{-2+\sqrt{20}}{8},\frac{-2-\sqrt{20}}{8}\right\}$  

•  $\left\{\frac{1+\sqrt{5}}{4},\ \frac{1-\sqrt{5}}{4}\right\}$  

Tags

CCSS.HSA-REI.B.4B

Factor completely.
2n² + 13n + 15

• (5n - 9)(n - 3)
• (3n + 7)(n + 4)
• (2n + 3)(n + 5)
• Not factorable

Factor
3a² + 4a + 1

• (7a-10)(a-8)
• Not factorable
• (3a+1)(a+1)
• (3a-1)(a-1)

What is the GCF of the trinomial?
3x² - 9x -120

• 3
• 2
• 6
• 9