6(x^2 - 4) + 8 - 2x^2 = 7

6(x^2 - 4) + 8 - 2x^2 = 7

6(x^2) (6)( - 4) + 8 - 2x^2 = 7

6x^2 -24 + 8 - 2x^2 = 7

4x^2-16=7

4x^2-16+16=7+16

4x^2=23

4x^2/4=23/4

x^2=5.75

sqrtx^2=sqrt5.75

x=2.40