Unit 2 Test Prep: Solving Quads and Quad Systems

• x = -5, x= -1

• x = 1 x= 5

• x = 7, x= 6

• No solution

• x = 10, x= -2

• x = -10, x= 2

• x = 6, x= 1

Identify the zeros of the graph

• (0, -3)
• (-1, 0) and (3, 0)
• (1, -4)
• None of the above

Tags

CCSS.HSA.APR.B.3

CCSS.HSA.REI.D.11

Solve using square roots: $3\left(x+4\right)^2=81$  

•  $x=-4\pm3\sqrt{3}$  

•  $x=-4\pm9i$  

•  $x=-4\pm9\sqrt{3}$  

•  $x=-4\pm3i$  

Solve using the Quadratic Formula:   $-20x=4x^2+25$  

•  $x=\pm\frac{5}{2}$  

•  $x=-\frac{5}{2}$  

•  $x=\frac{20\pm20\sqrt{2}}{-8}$  

•  $x=\frac{-10\pm10\sqrt{2}}{5}$  

What should you do first to solve this equation?

 $x^2+6x-13=3$  

• Factor

• Write down: a=1, b=6, c=-13

• Make it equal 0 by subtracting 3 on each side

• Type it all in a calculator.

• x= 81 x=-81

• x= 9 only

• x= 9 x=-9

• x= 3, x=-3

• x=-4, x=2

• x= -2, x= 4

• x= -16

• x= -4