BONSOIR URGENT POUR DEMAIN a) Factoriser 16-x² b)Factoriser 16-x²-(4-x)(8-3x) c) Résoudre l'inéquat.... Pergunta de ideia deAyselceline

Ayselceline @Ayselceline

April 2019 1 67 Report

BONSOIR URGENT POUR DEMAIN

a) Factoriser 16-x²
b)Factoriser 16-x²-(4-x)(8-3x)
c) Résoudre l'inéquation: 16-x²-(4-x)(8-3x) ≥0

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Sadjo A). 16-x^2=4^2-x^2=(4-x)(4+x). b). 16-x^2-(4-x)(8-3x)=(4-x)[4+x-8+3x]=4*(4-x)(x-1). c). 16-x^2-(4-x)(8-3x)<=0 équivaut: (4-x)(4+x)>=(4-x)(8-3x). donc: 4+x>=8-3x donc 1>=x d'où x appartient [1;+infini[.

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