Mathematics: Factor by grouping: 4-12r+9r^2i know the answer is (2-3r)^2can anyone explain to me how it is?

Factor by grouping: 4-12r+9r^2i know the answer

Ответ:

niicoleassssssf

31.12.2021

$(x-y)^2=x^2-2xy+y^2\\---------------------------\\\\4-12r+9r^2=2^2-2\cdot2\cdot3r+(3r)^2=(2-3r)^2$

$other\ method:\\\\4-12r+9r^2=4-6r-6r+9r^2=2(2-3r)-3r(2-3r)\\\\=(2-3r)(2-3r)=(2-3r)^2$

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Ответ:

alexanderjones9116

31.12.2021

Mathematics

Because:

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Ответ:

joyceslater16

08.10.2020

Mathematics

Step 1: y - 1

Step 2: x - 4

Step 3: (x-4)^2+(y-1)^2=3^2

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Factor by grouping:
4-12r+9r^2
i know the answer is (2-3r)^2
can anyone explain to me how it is?

Ответ:

Ответ:

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