Sum and Product of Roots - PreCalc U5L14

2x² - 6x - 7 = 0
What are the sum and the product of roots?

• Sum = 3
  Product = 7/2
• Sum = - 3
  Product = - 7/2
• Sum = - 3
  Product = 7/2
• Sum = 3
  Product = - 7/2

Tags

CCSS.HSA-REI.B.4B

-2x² - 5x + 1 = 0
What are the sum and product of roots?

• Sum = 5/2
  Product = 1/2
• Sum = - 5/2
  Product = - 1/2
• Sum = - 5/2
  Product = 1/2
• Sum = 5/2
  Product = - 1/2

Tags

CCSS.HSA-REI.B.4B

ax² - 3x - c = 0
Given the sum and product of roots are 6 and -9 respectively. What are the values of a and c?

• a = 1/2
  c = 9/2
• a = - 1/2
  c = - 9/2
• a = - 1/2
  c = 9/2
• a = 1/2
  c = - 9/2

Find the sum of the roots (2 + 5i) and (2 - 5i)

• 4

• 4i

• 4 + 10i

• 4 - i

Find the product of the roots (5 + 2i) and (5 - 2i)

• 25

• 25 - 4i

• 29

• 21

(7 − √2)(5 + √3)

• 35 + 7√3 − 5√2 − √6
• 29 + 7√3 − 5√2
• 35 +√10 − √7 −√6
• √50

2√27 + 2√27 - 2√3 =

• 10√3
• -10√3
• 3√10
• -3√10

• 17√2
• 9√1
• 9
• 9√2

Tags

CCSS.HSA.REI.A.2

CCSS.HSN.RN.A.1

CCSS.HSN.RN.A.2

Evaluate (6 + 3√3) (6 - 3√3)

• 9

• 63

• 36 - 9√3

• 36 + 9√3

What is the sum of the roots of x² - 6x - 5 = 0?

• 6
• -6
• -5
• 5

Tags

CCSS.HSA-REI.B.4B