Factorise
4x² - 20xy + 25y²
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Answer:
4x²-20xy+25y²
1 step: (4-20+25) ' (x²+XY+y²)
2 step : (25+20)'4" {XY}³
3 step : 45-4. (XY)³
4 step : 41x³y³
ANSWER ; 41x³y³
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