Real World Quadratics Zeros

If one of the zeros of quadratic polynomial (k-1)x²+kx+1 is -3, then the value of k is

• 4/3

• -4/3

• 2/3

• -2/3

If one zero of the quadratic polynomial x² + 3x + k is 2, then the value of k is

• 10

• -10

• 5

• -5

If α,β be the zeros of the quadratic polynomial 2 - 3x - x², then α + β = _____

• 2

• - 3

• 1

• None of the above

How many roots does this parabola have? 

• 3

• 2

• 0

• 1

Find the roots/zeros of x² + x - 2

• -1, 2

• -2, 1

Find the roots/zeros of x² + 4x - 21

• -7, 3

• -3, 7

Find the roots/zeros of x² - x - 20

• -5, 4

• -4, 5

Solve
x² + 2x - 24 = 0

• x = -6, x = 4

• x = 6, x = -4

• x = 12, x = -2

• x = 8, x = -3

Solve
x² + 7x + 12 = 0

• x = -2, x = -10

• x = -3, x = -4

• x = -4, x = -5

• x = -4, x = -6

Find the roots/zeros of x² - 3x - 10

• -2, 5

• -5, 2