Câu hỏi của Phạm Đăng Anh

Question

Mn giúp mình với mình đang cần gấp

Tô Mì · Accepted Answer

a/ $\left(x-3\right)^2+6\left(x-3\right)+9$$=\left(x-3\right)^2+2.\left(x-3\right).3+3^2$$=\left(x-3+3\right)^2=x^2$==========b/ $\left(x+2021\right)^2+2\left(x+2021\right)\left(x-2021\right)+\left(x-2021\right)^2$$=\left(x+2021+x-2021\right)^2=4x^2$===========c/ $2022^2-2.2021.2022+2021^2$$=\left(2022-2021\right)^2=1$==========d/ $\left(x+44\right)^2-88\left(x+44\right)+1936$$=\left(x+44\right)^2-2.\left(x+44\right).44+44^2$$=\left(x+44-44\right)^2=x^2$Câu trả lời: a/ $\left(x-3\right)^2+6\left(x-3\right)+9$$=\left(x-3\right)^2+2.\left(x-3\right).3+3^2$$=\left(x-3+3\right)^2=x^2$==========b/ $\left(x+2021\right)^2+2\left(x+2021\right)\left(x-2021\right)+\left(x-2021\right)^2$$=\left(x+2021+x-2021\right)^2=4x^2$===========c/ $2022^2-2.2021.2022+2021^2$$=\left(2022-2021\right)^2=1$==========d/ $\left(x+44\right)^2-88\left(x+44\right)+1936$$=\left(x+44\right)^2-2.\left(x+44\right).44+44^2$$=\left(x+44-44\right)^2=x^2$

Nguyễn Lê Phước Thịnh · Answer

d: Ta có: $\left(x+44\right)^2-88\left(x+44\right)+1936$$=\left(x+44-44\right)^2$$=x^2$Câu trả lời: d: Ta có: $\left(x+44\right)^2-88\left(x+44\right)+1936$$=\left(x+44-44\right)^2$$=x^2$

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