show that : - (2x+5)² — 20x=(2x—5)²
MonsieurBrainly:
-(2x+5)2 ?? Or (2x+5)2.
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On expanding :
4x² + 25 + 20x - 20x = 4x² + 25 - 20x
⇒ 4x² + 25 = 4x² + 25 - 20x
It can't be proved as both are not equal.
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