Question
Sa fait 30min et je n'arrive pas à simplifier. Svp aidez moi
A. (x+4)(x+5)
B. (x-3)(x+8)
C. (2y+1)(y+3)
D. (y-5)(y-2)
A. (x+4)(x+5)
B. (x-3)(x+8)
C. (2y+1)(y+3)
D. (y-5)(y-2)
Asked by: USER8344
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147 Answers
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Answer (147)
Bonjour,
"développer et réduire" plutôt que "simplifier".....
(x+4)(x+5) = x²+5x+4x+20 = x²+9x+20
(x-3)(x+8) = x²+8x-3x-24 = x²+5x-24
(2y+1)(y+3) = 2y²+6y+y+3 = 2y²+7y+3
(y-5)(y-2) = y²-2y-5y+10 = y²-7y+10