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moreaulea
@moreaulea
January 2021
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Bonjour, il faut que je factorise 2 expressions, mais je n'y arrive vraiment pas...
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jennyf
A(x)=4(X+2)-9(2x+1)
A(x)=2²(x+2)-3²(2x+1)
A(x)=(2(x+2))²-(3(2x+1))²=(2(x+2)+(3(2x+1))*(2(x+2)-3(2x-1))=(2x+4+6x+3)(2x+4-6x+3)=(8x+7)(7-4x)
B(x)=(2x-7)(3x+6)-2(2x+4)(2x-8)
=3*(2 x - 7) (x + 2) - 4 (x + 2) (2 x - 8)=(x+2)*(3*(2 x - 7) - 4 (2 x - 8))=(x+2)*(11-2*x)
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Thanks 1
moreaulea
Merci beaucoup
moreaulea
Excuse moi vous avez été deux à me répondre et ce n'est pas les meme résultats... je ne sais pas laquelle noté
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A(x)=2²(x+2)-3²(2x+1)
A(x)=(2(x+2))²-(3(2x+1))²=(2(x+2)+(3(2x+1))*(2(x+2)-3(2x-1))=(2x+4+6x+3)(2x+4-6x+3)=(8x+7)(7-4x)
B(x)=(2x-7)(3x+6)-2(2x+4)(2x-8)=3*(2 x - 7) (x + 2) - 4 (x + 2) (2 x - 8)=(x+2)*(3*(2 x - 7) - 4 (2 x - 8))=(x+2)*(11-2*x)