Solving Quadratics Factor Square Root and Quadratic Formula

Solve -5x² = -50

• ± 5

• ± 10

• ± √10

• -10

Solve by taking square roots:
5b² - 4 = 41

• b = 9, b = -9
• b = 3, b = -3
• b = 8, b = -8
• no solution

Solve 14 - x² = 17

• x = ±1.73
• x = 3
• no solution
• x = -3

Solve by factorising: x² - 9x + 20 = 0

• x = -4 and x = -5

• x = 20 and x = -9

• x = 4 and x = 5

• x = -4 and x = 5

Factorise: 49x² - 100

• (49x + 100)(x - 1)

• (7x - 10)(7x + 10)

• (49x - 10)(x + 10)

• (7x -10)(7x - 10)

Factorise:   3x²- 6x - 24

• (3x - 8)(x + 3)

• (3x + 4)(x - 6)

• 3(x - 2)(x + 4)

• 3(x + 2)(x - 4)

Solve 7x² - 26x - 8 = 0

• x = -1 and x = -7/8

• x = 4 and x = -2/7

• x = -4 and x = 2/7

• x = 4 and x = -7/2

Solve (x + 1) ² = 25

• ± 5

• 4  or  -6

• -4  or  6

• ± 4

Solve (x+3)²-5 = 9

• -3±√14

• 3±√14

• ±11

• ±5

What is this formula?

• This is the speed of light formula.
• This is the quadratic formula.
• This is the zero product property.
• This is scary.