bonjour
développer :
(2x-1)²-(2x-1)(x-6)
= 4x²-4x+1-(2x²-12x-x+6)
= 4x²-4x+1-(2x²-13x+6)
= 4x²-4x+1-2x²+13x-6
= 2x²+9x-5
résoudre l'équation :
4(2+3x)-(x-5)= 0
= 8+12x-x+5 = 0
= 13+11x = 0
= 11x = -13
x= -13/11
S={-13/11}
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bonjour
développer :
(2x-1)²-(2x-1)(x-6)
= 4x²-4x+1-(2x²-12x-x+6)
= 4x²-4x+1-(2x²-13x+6)
= 4x²-4x+1-2x²+13x-6
= 2x²+9x-5
résoudre l'équation :
4(2+3x)-(x-5)= 0
= 8+12x-x+5 = 0
= 13+11x = 0
= 11x = -13
x= -13/11
S={-13/11}