(Y+1)(Y+3)-15因式分解,

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(Y+1)(Y+3)-15因式分解,(Y+1)(Y+3)-15因式分解,(Y+1)(Y+3)-15因式分解,(Y+1)(Y+3)-15=y²+4y-12=(y+6)(y-2)(Y+1)(Y+

(Y+1)(Y+3)-15因式分解,
(Y+1)(Y+3)-15因式分解,

(Y+1)(Y+3)-15因式分解,
(Y+1)(Y+3)-15
=y²+4y-12
=(y+6)(y-2)

(Y+1)(Y+3)-15=Y²+4Y+3-15=Y²+4Y-12=(Y+6)(Y-2)