Factor s^2-6sd+9d^2

Math
s2-6sd+9d2
Rewrite 9d2 as (3d)2.
s2-6sd+(3d)2
Check that the middle term is two times the product of the numbers being squared in the first term and third term.
6sd=2⋅s⋅(3d)
Rewrite the polynomial.
s2-2⋅s⋅(3d)+(3d)2
Factor using the perfect square trinomial rule a2-2ab+b2=(a-b)2, where a=s and b=3d.
(s-3d)2
Factor s^2-6sd+9d^2

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