kellimcollier8294
18.08.2019 •
Mathematics
Can someone me factor this?
a)
b)
c)
d)
!
Solved
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Ответ:
(a+b)^2=a^2+2ab+b^2
(a-b)^2=a^2-2ab+b^2
x^2-4x+4=x^2- 2*2*x +2^2=(x-2)^2
The answer is B
You can check like this:
(x-2)^2=(x-2)(x-2)=x*x-2x-2x+4=x^2-4x+4
Ответ: