G9 Mathematics KOI

Solve the equation by factoring:

x²-6x+8=0

• x = 2 or x = 4

• x = -2 or x = -4

• x = -2 or x = 4

• x = 2 or x = -4

Which answer choice correctly shows the quadratic equation above in factored form?

• (x + 7)(x - 2) = 0

• (x - 7)(x + 2) = 0

• (x - 7)(x - 2) = 0

• (x + 7)(x + 2) = 0

Solve by taking the square root:
4x² = 100

• -10, 10
• -25, 25
• -5, 5
• 5

Solve by factoring:
x² - 16 = 0

• 4
• -4
• -4, 4
• 16

Solve by factoring:

x² + 2x - 20 = 4

• x = -6, x = 4

• x = 6, x = -4

• x = 12, x = -2

• x = 8, x = -3

Solve by taking the square root:

7x² + 1 = 8

• ± 1

• ± 7

• ± √7

• ± 8

Solve by completing the square:

x² + 10x = -9

• 1 and -12

• -1 and -9

• 1 and -9

• 1 and -1

• p = 2 or p = -1

• p = 1 or p = -2

• p = 4 or p = -2

• No solution

Solve using the quadratic formula:

2x² + 2x - 12 = 0

• -2 or 3

• 2 or 3

• 2 or -3

• -2 or -3

已知(m－1)x^|m|+1－3x＋1＝0是关于x的一元二次方程，则m＝ (a)