Bonjour,
5 (2x-3)² - (5x-2) (5x+2) = 5 ( 4x²-12x+9) - ( 25x²- 4 )
= 20x² -60x+45 - 25x²+4
= -5x² -60x + 49
bonjour
5(2x- 3)² - (5x - 2)(5x + 2)
= 5(4x²- 12x + 9) - (25x² + 10x - 10x - 4)
= 20x² - 60x + 45 - 25x² + 4
= -5x² - 60x + 49
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Bonjour,
5 (2x-3)² - (5x-2) (5x+2) = 5 ( 4x²-12x+9) - ( 25x²- 4 )
= 20x² -60x+45 - 25x²+4
= -5x² -60x + 49
bonjour
5(2x- 3)² - (5x - 2)(5x + 2)
= 5(4x²- 12x + 9) - (25x² + 10x - 10x - 4)
= 20x² - 60x + 45 - 25x² + 4
= -5x² - 60x + 49