Why cant 81-x to the forth power be factored unti (3+x) squared times (3-x) squared

Below.

Step-by-step explanation:

81 - x^4        Treat as the difference of 2 squares:

= (9 - x^2)(9 + x^2)

We can further factor the 9 - x^2   (difference of 2 squares)

= (3 - x)(3 + x)(9 + x^2).

9 + x^2 can't be factored.

34.5 cm

step-by-step explanation:

generally for a circular segment of angle, θ° and radius r

arc length

= (θ/360) x circumference

= (θ/360) x 2πr

in our case, θ = 60°, π=3.142 and r = 33 cm

substitute into above formula

arc length

= (60/360) x 2(3.142)( 33) = 34.5 cm