Question

a)2x^2+5x+2

b))3x^2+5x-2

c)3x^2-22x+7

d)3x^2-10x-8

Answer 1

Răspuns:

Explicație pas cu pas:

a)2x²+5x+2=0  

x1/2=-5+-√25-16/4      x1=-5-3/4=-2    x2=-5+3/4=-1/2

(x+2)(x+1/2)

b) 3x²+5x-2=0    

x1.2=-5+-√25+24/6      x1=-5-7/6=-2     x2=-5+7/6=1/3

(x+2)(x-1/3)

c)3x²-10x-8=0

x1.2=5+-√25+24/3       x1=5+7/3=12/3=4      x2=5-7/3=-2/3

(x-4)(x+2/3)