计算或简化(-3-4y)(-3+4y)+(3-4y)²

问题描述:

计算或简化(-3-4y)(-3+4y)+(3-4y)²

(-3-4y)(-3+4y)+(3-4y)²
原式=[-(3+4y)][-(3-4y)]+(3-4y)²
=(3+4y)(3-4y)+(3-4y)²
=(3-4y)(3+4y+3-4y)
=6(3-4y)