Factorization (2 11:56:47) （a-2b）²-a+2b

Factorization (2 11:56:47) （a-2b）²-a+2b

X ^ 3-2x ^ 2-x + 2 = 0,

x^3-2x^2-x+2
=x²(x-2)-(x-2)
=（x-2）（x²-1）
=（x-2）（x-1）（x+1）

Please explain the factorization of mathematics in junior three, thank you! (11 19:50:22)
4a2-ab2+2a2b-4ab+b^2
thank you

Is it 4A ^ 2-AB ^ 2 + 2A ^ 2b-4ab + B ^ 2?
If so, the original formula = (2a-b) ^ 2-AB ^ 2 + 2A ^ 2B
=（2a-b）^2-ab(b-2a)

Factorization (12 19:29:5)
1. &# 160; &# 160; &# 160; &# 160; it is known that 3x-4y-z = 0,2x + y-8z + 0. Find the value of x2 + Y2 + Z2 / XY + YZ + 2zx

If we treat the condition as a system of linear equations of two variables about X and y, and use Z to express X and y, we can solve it. Equation (1) is multiplied by 2, and then minus equation (2) by 3, we get - 11y + 22z = 0, so y = 2Z. Substituting equation (2), we get x = 3Z. So (X & sup2; + Y & sup2; + Z & sup2;) / (XY + YZ + 2zx) = (9z & sup2; + 4Z & sup2