Algebraic Formulae

An equation which combines variables with an equal sign is a 

• value
• formulae
• statement 
• operations

In which of the following, is E the subject of the formula?

• E = L ⁄ 5E
• 2E = bh
• E = mc²
• E² = u² + 2as

(m + n)² can be expressed as 

• m + n²
• 2 (m + n)
• m² + n²
• (m + n) (m + n)

Which of the following is true?

• (a-b)² = a² - b²
• (a + b)² = a² + 2ab + b²
• (a - b)² = a² - 2ab - b²
• (a + b) (a - b) = a² - 2ab + b²

Which of the following is the variable?

• Total number of days in August.
• The number of hours in a day.
• Total number of side of a square. 
• Number of students in a school bus everyday 

The area, A of trapezium ABCD is given by the formula A = ½ h (a + b).
Which of the following is true?

• h is the length of AB
• h is the length of DC
• a is the length of AB
• b is the length of DC

A rectangle is r cm long, s cm wide and has an area of P cm². Express P in terms of r and s.

• P = rs
• P = r ∕ s
• P = 2rs
• P = (rs)²

r(s − 2t) can be expressed as 

• rs - rt
• rs − 2t
• rs − 2rt
• s − 2t

Given that x = 5 and y = ½, hence 3x² − 2xy =

• 25
• 55 
• 70
• 85

(2p + 3q)(p − 6q)

• 2p² − 12pq + 3pq − 18q²
• 2p² − 12pq + p − 6q
• 2p + 3q + p − 6q
• 2p + 3pq − 18q²