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il suffit de factoriser
f(x) = (2x-3)(x-1) -4(x-1)²
f(x) = (x-1)(2x-3)-4(x-1)(x-1)
f(x) = (x-1)(-2x+1)
f(x) = 0 pour x = 1 ou x = -1/-2 = 1/2
il suffit de factoriser
f(x) = (2x-3)(x-1) -4(x-1)²
f(x) = (x-1)(2x-3)-4(x-1)(x-1)
f(x) = (x-1)(-2x+1)
f(x) = 0 pour x = 1 ou x = -1/-2 = 1/2