Verified answer

1) (х+4)^2-(x-2)(x+2)=0

х^2+8х+16-х^2+4=0

8х=-20

х=-20/8=-2 1/2

2)(2x-5)^2-(2x-3)(2x+3)=0

4х^2-20х+25-4х^2+9=0

-20х=-36

х=1,8

3)(3x+5)(3x-5)-(3x-1)^2=10

9х^2-25-9х^2+6х-1-10=0

6х=36

х=6

4) 2(2x+1)^2 -8(x+1)(x-1)=34

8х^2+8х+2-8х^2+8=34

8х=24

х=3