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Factorise 25x2 + 16 y2 + 4 z2 - 40xy +16yz - 20zx |
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Answer» Step-by-step explanation: 25x² + 16y² + 4z² - 40XY + 16yz - 20zx (-5X)² + (4Y)² + (2Z)² +2(-5x)² + 2(4y)(2z) +2(-5x)(2z) (4y + 2z - 5x)² |
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