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
答
(-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)