(4-x) (4+x)-(4+x)²>-8

Question

(4-x) (4+x)-(4+x)²>-8

Answer 1

(4-х)(4+х)-(4+х)^2>-8
16-х^2-(16+8х+х^2)>-8
16-х^2-16-8х-х^2>-8
-2х^2-8х+8>0
х^2+4х-4<0<br>D=16-4*4=0
x=-b/2a
x=-4/2
x=-2