Solve the equation 48-8x = 4 (X-2) 9 (X-8) = 11x-8 (X-2)

Solve the equation 48-8x = 4 (X-2) 9 (X-8) = 11x-8 (X-2)

48-8X=4(X-2)
48-8X=4X-8
8X+4X=48+8
12X=56
X=56÷12
X=14/3
X = 14 / 3
9（X-8）=11X-8（X-2）
9X-72=11X-8X+16
9X-11X+8X=16+72
6X=88
X=44/3
X = 44 / 3

Let f (x) = X3 + 4x2 + 11x + 7, then f (- x) is?

f(x)=x^3+4x^2+11x+7
Then:
f(-x)=(-x)^3+4(-x)^2+11(-x)+7
=-x^3+4x^2-11x+7
In fact, it is to replace X in the equation with - X

Solving: cube of X - square of 11x + 31x-21

x³－11x²＋31x－21
=x³－x²－﹙10x²－31x＋21﹚
＝x²﹙x－1﹚－﹙x－1﹚﹙10x－21﹚
＝﹙x－1﹚﹙x²－10x＋21﹚
＝﹙x－1﹚﹙x－3﹚﹙x－7﹚

X & # 178; - 4x-12 = 0 solving the equation

＝﹙x－6﹚﹙x＋2﹚
X = 6 or - 2