Expansion and Application of Special Products
Expansion and Application of Special Products
TGM Original
- Expand \(\left( 2x-3 \right)\left( 2x+3 \right)\).
- Hence, find the value of \(397\times 403\) without the use of a calculator. Show your workings clearly.
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Answer:(a) \(4x^2-9\) (b) \(159\,991\)
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