Bonsoir juste cet exo svp merci d'avance.... Pergunta de ideia deBelinda123

Belinda123 @Belinda123

May 2019 1 40 Report

Bonsoir
juste cet exo svp
merci d'avance

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Geijutsu

Verified answer

Bonsoir,

A(x) = (2x+1)(2x-1) = (2x)²-1² = 4x²-1

B(x) = (4x-5)² = (4x)²-2*4x*5+5² = 16x²-40x+25

C(x) = (-4x+3)(x-1)+(x+1)² = -4x²+4x+3x-3+(x+1)² = -4x²+7x-3+(x+1)² = -4x²+7x-3+x²+2*x*1+1² = -4x²+7x-3+x²+2x+1 = -3x²+9x-2

D(x) = (3x-1)(2x+5)-(x+1)(x-2) = 6x²+15x-2x-5-(x+1)(x-2) = 6x²+13x-5-(x+1)(x-2) = 6x²+13x-5-(x²-2x+x-2) = 6x²+13x-5-x²+2x-x+2 = 5x²+14x-3

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