A2 - Quadratic Equations Review 2

Identify the y-intercept and the axis of symmetry for the graph of
 $f\left(x\right)=10x^2+40x+42$  

•  $42;\ x=4$  

•  $0;\ x=-4$  

•  $42;\ x=-2$  

•  $-42;\ x=2$  

Determine whether  $f\left(x\right)=4x^2-16x+6$  has a maximum or a minimum value and find the value. 

• minimum;  $\left(2,-10\right)$  

• minimum;  $\left(2,\ 2\right)$  

• maximum;  $\left(2,\ -10\right)$ 

• maximum;  $\left(2,\ 2\right)$  

The graph of  $f\left(x\right)=-2x^2+x$  opens _______ and has a _______ value. 

• down; maximum

• down; minimum

• up; maximum

• up; minimum

Use the graph to determine the solutions to the quadratic equation shown.

• $-2,\ 3$

• $0,\ -6$

• $-3,\ 2$

• $0,\ 2$

Solve  $x^2-3x=18$  by factoring. 

•  $6$  

•  $-6,\ 3$  

•  $-9,\ 2$  

•  $-3,\ 6$  

Tags

CCSS.HSA-REI.B.4B

Which quadratic equation has roots  $-2$  and  $\frac{1}{5}$ ? 

•  $x^2+4x+4=0$  

•  $5x^2+9x-2=0$  

•  $5x^2-9x-2=0$  

•  $5x^2-11x+2=0$  

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

Simplify
 $\left(4-12i\right)-\left(-8+4i\right)$  

•  $12-8$  

•  $28$  

•  $12-16i$  

•  $12+16i$  

Tags

CCSS.HSN.CN.A.2

Simplify

 $\frac{4-2i}{7+3i}$  

•  $\frac{11-13i}{29}$  

•  $\frac{11-14i}{29}$  

•  $\frac{13-17i}{29}$  

•  $\frac{17-13i}{29}$  

Tags

CCSS.HSN.CN.A.3

Simplify

 $\left(5+2i\right)\left(1+3i\right)$  

•  $5+6i$  

•  $-1$  

•  $-1+17i$  

•  $11+17i$  

Tags

CCSS.HSN.CN.A.2

Solve  $x^2-3x-10=0$  by factoring. 

•  $-5,\ 2$  

•  $-2,\ -5$  

•  $-2,\ 5$  

•  $-10,\ 1$  

Tags

CCSS.HSA-REI.B.4B