Question

9x²-4
18x²+24x+8


va rog frumos ajutatima

Answer 1

9x2-4 = (3x-2)(3x+2)

Answer 2

9x²-4=0
9x²=4
x²=4/9
x=+/-√9/4
x₁=3/2
x₂=-3/2
S={-3/2,+3/2}

18x²+24x+8=0                         :2
9x²+12x+4=0
Δ=12²-4·9·4=144-144=0
x₁=x₂=-12/9=-4/3
s={-4/3}