Add Math Revision

1. Given the equation x² + 3x – 4 = 0, using the ac method, when a is multiplied by c, the product is

• – 4

• – 3

• 3

• 4

1. (x² – y²) ÷ (x + y) =

• (x² + y²)

• ( x + y)

• ( x - y)

• (x² – y²)

If x² = 25, the value/s of x is /are

• 5

• -5 and 5

• -5

• -5 and 25

When 2x² + 6x – 8 is factorized, the two possible factors are

• (2x – 8)(x + 1)

• (2x – 8)(x – 1)

• (2x + 8)(x – 1)

• (2x + 8)(x + 1)

Given that (6x – 2)(x –2) = 0, one possible value of x is

• 3

• -1/3

• –2

• 1/3

Using completing the square method, when 5x² – 3x – 2 is factorized, the value of h is

• -3/10

• 3/10

• -49/20

• 49/20

For quadratic functions, if a < 0, then the vertex has a _____ point

• minimum

• maximum

• symmetrical

• turning

The vertex of a parabola is also called the _____

• line of symmetry

• turning point

• range

• curve

f(x) for any quadratic function occurs when x =

• -b/2a

• h

• -h

• k

Given the quadratic function f(x) = 5x² +30x + 36, the maximum or minimum value is?

• 9

• -3

• 3

• -9