Someone, can you me getting 30 points and explain.

(x - 4)^2/(7 x^3 + 12)

Step-by-step explanation:

Simplify the following:

(x^2 - 8 x + 16)/(7 x^2 x + 12)

x^2×7 x = x^(2 + 1)×7:

(x^2 - 8 x + 16)/(7 x^(2 + 1) + 12)

2 + 1 = 3:

(x^2 - 8 x + 16)/(7 x^3 + 12)

The factors of 16 that sum to -8 are -4 and -4. So, x^2 - 8 x + 16 = (x - 4) (x - 4):

((x - 4) (x - 4))/(7 x^3 + 12)

(x - 4) (x - 4) = (x - 4)^2:

(x - 4)^2/(7 x^3 + 12)

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm