Question

Viết tổng thành tích

a) a² - b²

b) a² - 2ab + b²

c) a² -2a +1  

Answer 1

a) \(a^2-b^2=\left(a-b\right)\left(a+b\right)\)

b) \(a^2-2ab+b^2=\left(a-b\right)^2=\left(a-b\right)\left(a-b\right)\)

c) \(a^2-2a+1=\left(a-1\right)^2=\left(a-1\right)\left(a-1\right)\)

Answer 2

tịnh vượn

Answer 3

\(a^2-b^2=\text{aa}.bb=\left(a-b\right).\left(a+b\right)\)

\(a^2-2ab+b^2=\left(a-b\right)^2=\left(a-b\right).\left(a+b\right)\)

\(a^2-2a+1=\left(a-1\right)^2=\left(a-1\right).\left(a-1\right)\)

Answer 4

a) \(a^2-b^2=\left(a-b\right)\left(a+b\right)\)

b) \(a^2-2ab+b^2=\left(a-b\right)^2=\left(a-b\right)\left(a-b\right)\)

c) \(a^2-2a+1=\left(a-1\right)^2=\left(a-1\right)\left(a-1\right)\)