polynomial exercise 2.2 question 4s2-4s+1
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2s²-2×2s×1+1²
(2s-1)²
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(2s-1)²
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4s^2+4s+1
=4s^2+2s+2s+1
=2s(2s+1)+1(2s+1)
=(2s+1)^2
=(2s+1)×(2s+1)
=4s^2+2s+2s+1
=2s(2s+1)+1(2s+1)
=(2s+1)^2
=(2s+1)×(2s+1)
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