Réponse :
Rappel :
a² - b² = ( a - b )( a + b )
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1) [tex](x+3)^2-16= (x+3)^2-4^2= (x+3-4)(x+3+4)= (x-1)(x+7)[/tex]
2) [tex](x+3)^2-(2x-1)^2 =(x+3-2x+1)(x+3+2x-1)= (-x+4)(3x+2)[/tex]
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Réponse :
Rappel :
a² - b² = ( a - b )( a + b )
__________________________________________________________
1) [tex](x+3)^2-16= (x+3)^2-4^2= (x+3-4)(x+3+4)= (x-1)(x+7)[/tex]
2) [tex](x+3)^2-(2x-1)^2 =(x+3-2x+1)(x+3+2x-1)= (-x+4)(3x+2)[/tex]