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mllechouette
@mllechouette
June 2021
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dévelloper puis reduire chaque expression:
a) (7x - 3)(6x + 1) b) (2x + 3)(3 - 2x) c) (-2 - 9x)(-4y - 1) d)(-10 - 3a)(2a - 9)
je voudrer svp TOUTES les étapes qui peut avoir merci
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maudmarine
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dévelloper puis reduire chaque expression:
a) (7x - 3)(6x + 1)
=42x²-18x+7x-3
=42x²-11x-3
b) (2x + 3)(3 - 2x)
=9-4x²
c) (-2 - 9x)(-4y - 1)
=(9x+2)(4y+1)
=36xy+8y+9x+2
d)(-10 - 3a)(2a - 9)
=-6a²+18a-20a+90
=-6a²-2a+90
2 votes
Thanks 1
Naz
b) (2x+3)(3-2x)
Naz
6x-4x^2+9-6x -4x^2+9
mllechouette
merci
Naz
De rien ;)
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Verified answer
dévelloper puis reduire chaque expression:a) (7x - 3)(6x + 1)
=42x²-18x+7x-3
=42x²-11x-3
b) (2x + 3)(3 - 2x)
=9-4x²
c) (-2 - 9x)(-4y - 1)
=(9x+2)(4y+1)
=36xy+8y+9x+2
d)(-10 - 3a)(2a - 9)
=-6a²+18a-20a+90
=-6a²-2a+90