因式分解 (x-1)(x-3)+1 ab+a+b+1

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因式分解(x-1)(x-3)+1ab+a+b+1因式分解(x-1)(x-3)+1ab+a+b+1因式分解(x-1)(x-3)+1ab+a+b+1(x-1)(x-3)+1=x²-4x+3+1=

因式分解 (x-1)(x-3)+1 ab+a+b+1
因式分解 (x-1)(x-3)+1 ab+a+b+1

因式分解 (x-1)(x-3)+1 ab+a+b+1
(x-1)(x-3)+1
=x²-4x+3+1
=x²-4x+4
=(x-2)²
ab+a+b+1
=(a+1)(b+1)

(x-1)(x-3)+1=(x-2)^1/2
ab+a+b+1=(a+1)(b+1)

(x-1)(x-3)+1=x^2-4x+3+1==x^2-4x+4=(x-2)^2
ab+a+b+1=a(b+1)+b+1=(a+1)(b+1)

(x-1)(x-3)+1
=x^2-4x+3+1
=x^2-4x+4
=(x-2)^2
ab+a+b+1
=a(b+1)+(b+1)
=(a+1)(b+1)

x²-4x+3+1=x²-4x+4=(x-2)²
ab+b+a+1=b(a+1)+a+1=(a+1)(b+1)