因式分解x^2+6xy+9y^2-16a^2+8a-1

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因式分解x^2+6xy+9y^2-16a^2+8a-1
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因式分解x^2+6xy+9y^2-16a^2+8a-1
因式分解x^2+6xy+9y^2-16a^2+8a-1

因式分解x^2+6xy+9y^2-16a^2+8a-1
x^2+6xy+9y^2-16a^2+8a-1
=(x+3y)^2-(4a-1)^2
=(x+3y-4a+1)(x+3y+4a-1)

x^2+6xy+9y^2-16a^2+8a-1
=(x+3y)^2-(4a-1)^2
=(x+3y+4a-1)(x+3y-4a+1)

=x²+2*3xy+(3y)²-(4a)²+2*4a-1
=(x+3y)²-(4a-1)²
=(x+3y-4a+1)(x+3y+4a-1)
请给好评谢谢