Solving Quad Equations with Square Roots

Solve by using square roots: 5x² = -15. x = ?

• 3, -3

• 1.7, -1.7

• 1.5, -1.5

• no solution

Tags

CCSS.8.EE.A.2

Solve by using square roots: 2x² = 98. x = ?

• 49 or -49

• 9.89 or -9.89

• 7 or -7

• no solution

Tags

CCSS.8.EE.A.2

Solve by using square roots: x² - 64 = 0. x = ?

• 64

• 8

• 8 or -8

• 1 or -64

Tags

CCSS.8.EE.A.2

Solve by using square roots: x² = 100. x = ?

• 10

• 10 or -10

• 50

• 50 or -50

Tags

CCSS.8.EE.A.2

Solve by using square roots: x² + 16x + 64 = 0. x = ?

• 8

• -8

• -8 or 8

• no solution

Tags

CCSS.HSA-REI.B.4B

Solve by using square roots: x² - 14x + 49 = 0. x = ?

• 7

• -7

• -7 or 7

• 14

• -14 or 14

Tags

CCSS.HSA-REI.B.4B

Solve by using square roots: x² + 24x + 144 = 16. x = ?

• -8 or -16

• 8 or 16

• -20 or -28

• 20 or 28

Tags

CCSS.HSA-REI.B.4B

Solve by using square roots: k² - 6 = 43. k = ?

• k = √37

• k = 37 or - 37

• k = 7 or k = -7

• no solution

Tags

CCSS.8.EE.A.2

Solve by using square roots: x² - 4 = 77. x = ?

• 9

• -9

• No Real Solutions

• 9 or -9

Tags

CCSS.HSA-REI.B.4B

Solve by using square roots and completely simplify radicals: (x - 2)² = 99. x = ?

• $2\pm3\sqrt{11}$

• $-2\pm3\sqrt{11}$

• $2\pm9\sqrt{11}$

• $-2\pm9\sqrt{11}$

• $5\sqrt{11}\ \ or\ -1\sqrt{11}$

Tags

CCSS.HSA-REI.B.4B