3.3 Solving Quadratics by Square Root

Solve for x

x² = 64

• x = 8, -8

• x = 32, -32

• x = 4, -4

• No real solution

Tags

CCSS.8.EE.A.2

Solve for x

3x² - 27 = 0

• x = 4.9, -4.9

• x = 9, -9

• x = 3, -3

• No solution

Tags

CCSS.8.EE.A.2

Solve using square roots.
k² - 6 = 43

• k = √37
• k = 37 or - 37
• k = 7, k = -7
• no solution

Tags

CCSS.8.EE.A.2

Solve using square roots.
4m² - 100 = 0

• m=25, -25
• m=96
• m=5, -5
• m=-96

Tags

CCSS.8.EE.A.2

Solve using square roots.

• ±81
• ±9
• ±3
• No real solution

Tags

CCSS.8.EE.A.2

Solve:  $g^2+1=19$  

•  $g=\pm2\sqrt{5}$  

•  $g=\pm2\sqrt{3}$  

• No solution

•  $g=3\sqrt{2}$  and  $g=-3\sqrt{2}$  

Tags

CCSS.8.EE.A.2

Solve:  $4x^2=112$  

• No solution

•  $x=\pm2\sqrt{7}$  

•  $x=\pm7\sqrt{2}$  

•  $x=\pm6\sqrt{3}$  

Tags

CCSS.8.EE.A.2

Solve:  $-3x^2=-63$  

•  $x=\pm\sqrt{21}$  

•  $x=\pm2\sqrt{15}$  

•  $x=\pm\sqrt{66}$  

• No solution

Tags

CCSS.8.EE.A.2