HW 7.2 Solving Quadratics with Complex Solutions

Find the solutions of the quadratic equation x²-5x-10=0

• 6.53 and -1.53

• 1.53i and -6.53i

• 6.53i and -1.53i

• 1.53 and -6.53

Find the solutions of the quadratic equation 2x² + 3x - 11 = 0

• 3.21 and -1.71

• 1.71i and -3.21i

• 3.43 and -6.43

• 1.71 and -3.21

Find the solutions of the quadratic equation 3x² + 9x + 17 = 0

• 0.348 and -3.348

• -0.348i and 3.348i

• 0.348i and -3.348i

• -0.348 and 3.348

Find the solutions of the quadratic equation 4x² + 10x + 13 = 0

• -1.25+1.29i and -1.25-1.29i

• 1.25+1.29i and 1.25-1.29i

• 2.54 and -0.04

• 0.04 and -2.54

Solve.

x²−2x+11=0

• 1±i√10

• 1±√10

• -1±i√10

• -1±√10

What does i² = ?

• -1
• √-1
• 1
• -√1

Solve x² - 5x + 10 = 0

• (5 - i√15)/2  ,  (5 + i√15)/2
• (5 - √15)/2  ,  (5 + √15)/2
• (5 - i√65)/2  ,  (5 + i√65)/2
• (5 - √65)/2  ,  (5 + √65)/2

Solve for x: 

• x = {-4, -1}
• x = {-1, -4}
• x = {2+i, 2-i}
• x = {-2+i, -2-i}

How confident are you in solving quadratic equations on a scale of 1-4?

• 1- I am struggling

• 2- I can sometimes do this

• 3- I can do this

• 4- I can teach someone else