# Math

Factorize:
a^2 -1 + 2b - b^2

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1. a2+1+b2-2b

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2. a2+b2(-1+2)b

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3. a^2 -1 + 2b - b^2
= a^2 - (b^2 - 2b + 1)
= a^2 - (b-1)^2 , now we have a difference of squares
= (a + (b-1))(a - (b-1))
= (a+b-1)(a-b+1)

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4. This is very useful for me.
Thanks ⭐️⭐️

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5. ᴛʜɪꜱ ɪꜱ ᴠᴇʀy ᴜꜱᴇꜰᴜʟ ꜰᴏʀ ᴍᴇ.
ᴛʜᴀɴᴋᴜ⭐

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