Question

102533
rezultatul ecuatiei:
a)x-2 tot supra 3=1 supra 2
b)2x-1 tot supra 4=x-3 tot supra 7
c)x la puterea 2 -5x-6=0

Answer 1

a) (x-2)/3 = 1/2 Inmultim pe diagonala 2(x-2) = 3 2x - 4 = 3 2x = 7 x = 7/2 b) (2x-1)/4=(x-3)/7 Inmultim pe diagonala 7(2x-1) = 4(x-3) 14x-7 = 4x-12 10x = -5 x = -5/10 x = -1/2 c) x²-5x-6=0 a=1; b = -5; c = -6 Delta = b²-4*a*c = 25-4*1*(-6) = 25+24 = 49 x1,2 = (-b +/- √delta)/2a x1 = (5+7)/2 = 12/2 = 6 x2 = (5-7)/2 = -2/2 = -1

Answer 2

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