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(2x -5)-(5x +2)(2x -5)​

Répondre :

(2x -5) - (5x +2)(2x -5)​
= (2x-5)*1 - (5x+2)(2x-5)
= (2x-5)(1 - (5x+2))
= (2x-5)(1 - 5x - 2)
= (2x-5)(-1 - 5x)
= -2x - 10x^2 + 5 + 25x
= -10x^2 + 23x +5