Square roots and imaginary numbers

• 8, -8

• 13, -13

• 5, -5

• 62, -62

Tags

CCSS.8.EE.A.2

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

• i

• 1

• -1

• -i

What is the solution set for the equation x² + 64 = 0

• {-8, 8}

• {-8i, 8i}

• {-16i, 16i}

• {-64i, 64i}

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Solve.  
x² +12 = 5

• x = ± 49
• x = ± i√7
• x = ± √7
• x = ± 3.5i

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7