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Edexcel IGCSE Math B 3.B Formulae Question Bank

Practise substituting into formulae and rearranging equations, including fractions, powers and variables on both sides.

Syllabus
First assessment 2018
Course
Math B 4MB1

Exam points

  • make a named variable the subject by clearing fractions, roots or brackets in stages
  • substitute signed values into algebraic expressions, keeping powers and negatives accurate
  • collect repeated subject terms before factorising to isolate the required variable

3.B Formulae question 1

[Maximum number: 2]
Figure for Question 3.B Formulae question 1 — Edexcel IGCSE Math B
Figure for Question 3.B Formulae question 1 — Edexcel IGCSE Math B

Diagrams NOT accurately drawn.

Figure 3 shows a rectangle with dimensions 20 cm by 10 cm from which a square with sides of length x cm is removed from each of the corners.
The shape in Figure 3 is then folded along the dotted lines to form a box, without a lid, in the shape of a cuboid, shown in Figure 4.
The volume of the box is V cm3V\,\mathrm{cm}^3.

Complete the following table of values for V=4x3−60x2+200xV=4x^3-60x^2+200x.

Table for Question 3.B Formulae question 1 — Edexcel IGCSE Math B
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