Algebra Review

When solved, which equation gives 1 as a result?

• none

• x + 5 = 14 - x/2

• 2x/(x + 1) = (2x - 1)/x

• x² + 4x + 3 = 0

Solve the equation x² - x - 12 = 0

• -3, 4

• 12

• 1, 12

• 3, -4

• cannot be simplified

Factor x³y - 4xy

• x(x²y - 4y)

• x²(xy - 4y)

• xy(x² - 4)

• xy(x - 2)(x + 2)

Expand and simplify (x + 2)³

• x³ + 8

• x³ + 6x² + 12x + 8

• x³ + 6x² + 8

• x³ + 4x² + 8x + 8

Simplify (3a³b³)(4ab²)²

• 48a⁵b⁷

• 144a⁴b⁵

• 144a⁶b¹²

• 48a⁸b¹⁰

A symbol used to represent an unknown value is called a/an _______________. It is usually a letter such as a, X or Y etc..

• Constant
• Coefficient
• Operator
• Variable

2x (x + 3y) - y(2x - 4y) =

• 2x²  + 6xy + 4y²
• 2x²  + 4xy + 4y²
• 2x² + 2xy  - 4y²
• 2x² - 4xy + 4y²

Factorise
4m - 8mn + 6m²

• m(4 - 2n + 6m)
• 2m(2 - 4n + 3m)
• 2m³n