FORM2 Chapter 3

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

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

Find the value of 7j - 12 when j = 2.

• 2

• -2

• 5

• -5

Evaluate x/5 when x = 30.

• 5

• 3

• 4

• 6

Evaluate (y-2)/4 when y = 18.

• 1

• 2

• 3

• 4

Given T = 4k.

Make k as the subject.

• T/4

• 4T

• 4+T

• T - 4

p = r + 8.

Express r in terms of p.

• p - 8

• 8 - p

• p + 8