Printable worksheet ยท 2 of 4
Change the form without changing the value - Paper 2
Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.
Read before answering
Exact expressions A=3/sqrt(10) and B=1/(sqrt(10)+1), where sqrt is the non-negative square root. Multiply numerator AND denominator by the same non-zero factor. For B use conjugate sqrt(10)-1. The stated denominator is non-zero.
Worksheet preview
- Rationalise A=3/sqrt(10).
- Rationalise B=1/(sqrt(10)+1).
- Why would multiplying only the denominator fail to preserve the original value?
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