Sum and Product of Roots

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

-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

x² - 6x + c = 0

Given the sum and product of roots are 6 and -9 respectively. What is the value of c?

• c = 9

• c = - 9

• c = 9/2

• c = - 9/2

Tags

CCSS.HSA-REI.B.4B

Write the quadratic equation whose roots are 3 and 7.

• x² - 10x + 21 = 0
• x² + 10x + 21 = 0
• x² - 10x - 21 = 0
• x² + 10x - 21 = 0

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

• 6
• -6
• -5
• 5

In the quadratic equation 2x² + kx - 10, one of the roots is 2, what is the other root?

• 3

• -3

• 5/2

• -5/2

What is the value of k in the quadratic equation x² + 3x + k if one of the roots is -2?

• -2

• 2

• 4

• -4

What is the value of k in the quadratic equation 3x² + kx - 15 if one of the roots is 1?

• -12

• 12

• 5

• -5

Write a quadratic equation whose roots are -2 and 9.

• y = x² + 11x +18

• y = x² - 11x -18

• y = x² + 7x - 18

• y = x² - 7x - 18