M2 4.3-4.5 quiz

Solve:  $k^2=16$  

•  $k=-4$  

•  $k=4$  and  $k=-4$  

•  $k=4$  

• No solution

Solve:  $m^2+7=88$  

•  $m=\pm\sqrt{95}$  

• No solution

•  $m=\pm9$  

•  $m=\pm2\sqrt{22}$  

Solve:  $7x^2=-21$  

•  $x=\pm\sqrt{3}$  

• No solution

•  $x=\pm2\sqrt{7}$  

•  $x=\pm\sqrt{14}$  

Complete the square for
x² + 12x + ____

• x² + 12x + 144
• x² + 12x + 36
• x² + 12x - 36
• x² + +12x - 144

What is one of the solutions to this equation?
(2x - 1)² = 49

• 7
• -7
• -4
• -3

Write the following quadratic eqaution in completed square form...

x² + 6x = 5

• (x + 3)² = 5

• (x + 6)² = 9

• (x + 3)² = 14

• (x + 6)² = 14

Solve by completing the square.
x² +12x = 5

• X = 6 + √41 or  6 − √41
• X= 35 or 47
• X = −6 + √41 or  −6 − √41
• X = √35 or √47

Solve  $x^2+10x=39$  .

•  $x=-5\pm\sqrt{14}$  

•  $x=-3\ or\ 13$  

•  $x\ =\ 3\ or\ -13$  

•  $x=5\pm\sqrt{14}$  

Find the zeros of  $f\left(x\right)=x^2+7x+9$  .

•  $x=-7\pm\sqrt{13}$  

•  $x=\frac{-7\pm\sqrt{13}}{2}$  

•  $x=\frac{3\pm\sqrt{7}}{2}$  

•  $x=3\pm\sqrt{7}$  

What is this formula?

• This is the speed of light formula.
• This is the quadratic formula.
• This is the zero product property.
• This is scary.