Question

find value of z. 4z +xsquare=x+2 x-2 find using identity asquare -b square​

Answer 1

Answer:

4zsquare +xsquare=(x+2)(x-2)

we know (a-b) (a+b)=(a square-b square)

so,

4zsquare +xsquare=xsquare-4

4zsquare +xsquare-xsquare=-4

4z square=-4

z square =-4/4=-1

z=1