DUM10122 Prior Knowledge 1.5

What is a term in algebra?

• A number with no variable

• A mathematical operation

• A number, a variable, or both together

• A variable with no number

Which of the following is a constant?

• 2x

• 3

• y

• x+y

Identify the terms in the algebraic expression: 3x + 2y - 5z

• 3, 2, 5

• 3x, 2y, -5z

• x,y,z

• 3x, 2y, 5z

What is a coefficient?

• A variable

• A mathematical operation

• The number directly in front of the variable

• A number with no variable

Identify the coefficient of x in the expression: 3x + 2y - 5z

• y

• 3

• 2

• -5

Combine like terms in the expression: 2x + 3y - 4x + 5y

• -2x - 2y

• -2x + 8y

• 5x + 2y

• -6x + 8y

Simplify the expression: 5(3a + 2) - 2(4a - 5)

• 8a + 10

• 15a - 8

• 7a + 20

• 12a - 7

Simplify the expression: 2-4(2x - 5)

• -8x + 22

• -4x + 10

• -2x -14

• -6x + 20

• (x + 3)(x + 4)

• (x + 2)(x + 5)

• (x + 1)(x + 10)

• (x + 6)(x + 9)

Expand the following expression: 2(x + 2)(x + 3)