因式分解下列式子:y^2+7y+12=?要有过程哦

2025-01-07 00:37:24
推荐回答(2个)
回答1:

十字相乘法,左边为1,1,右边为3,4
y^2+7y+12
=(y+3)(y+4)

回答2:

y²+7y+12=?
=(y²+3y)+(4y+12)
=y(y+3)+4(y+3)
=(y+3)(y+4)