Question

precizati care dintre ecuatiile de mai his admit pe x=2 ca soluție​

Answer 1

Răspuns:

x=2

a)x^2=2^2=4 (admite solutia)

b)3x^2=3*2^2=3*4=12 (nu admite solutia)

c)-x^2=-2^2=-4 ( nu admite solutia)

d)x^2=2^2=4 (nu admite solutia)

e)2x^2=2*2^2=2*4=8 (admite solutia)

f)x^2-1=2^2-1=4-1=3 (nu admite solutia)

g)x^2+5=2^2+5=4+5=9 (admite solutia)

h)3x^2-6=3*2^2-6=3*4-6=12-6=6(nu admite solutia)

Raspuns: a,e,g

Explicație pas cu pas: