CAIE IGCSE Mathematics Extended E2.5.7 Change the Subject of Formulas Questions

Review CAIE IGCSE Mathematics formula rearrangement through repeated subject terms, algebraic denominators, powers, roots and bracket division.

Exam points

Rearrange formulae by collecting repeated subject terms, clearing denominators, and isolating powers, roots or bracketed variables.

[Maximum number: 4]

Rearrange the formula to make m the subject.
$R=\frac{2(m-k)}{m}$ m=

$m=\frac{2k}{2-R}$
or $m=\frac{-2k}{R-2}$
final answer
M1 for clearing fractions
M1 for expanding brackets (or $\div2$ )
M1 for collecting terms in m on one side and terms not in m on the other
M1 for dividing by a bracket, maximum 3 if final answer incorrect

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CAIE IGCSE Mathematics Extended E2.5.7 Change the Subject of Formulas Questions question 1