Mathematics 2 ESO – Unit 7 EQUATIONS Page 73 – Activity 22

Mathematics 2 ESO – Unit 7 EQUATIONS page 73 activity 22

a)  Watch the video and sing the song:

“The quadratic formula is negative b

Plus or minus the square root

Of b squared minus 4ac

All over 2a”.

b)  Listen to the song and answer:

I)  What is in the denominator of the “quadratic Formula”?

II)  What is inside the square root of the “quadratic Formula”?

III)  In the example, what is the value of “b”?

IV)  How many solutions are there if the discriminant is negative?

V)  How many solutions has the equation in the example? Why?

VI)  Solve:

  • x2 + 2x – 8 = 0
  • 2x2 + 4x + 2 = 0
  • 3x2 + 5x + 6 = 0