Bonjour je doit factoriser sa
x au carré -4-(x+2)(3x-5)
Merci de bien vouloir m aider
x au carré -4-(x+2)(3x-5)
Merci de bien vouloir m aider
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( x² -4)-(x+2)(3x-5) = (x-2)(x+2)-(x+2)(3x-5)
= (x+2)((x-2)-(3x-5))
= (x+2)(x-2-3x+5)
=(x+2)(-2x+3)
cordialement
= x^2 - 2^2 -(x+2)(3x-5)
= (x+2)(x-2) - (x+2)(3x-5)
= (x+2) [(x-2) - (3x-5)]
= (x+2) [x-2-3x+5]
= (x+2) (3-2x) .