计算:(1)(3x-5)²;(2)(-4a+1/2b)².

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/16 13:32:43
计算:(1)(3x-5)²;(2)(-4a+1/2b)².
x){nuӭ4 55+tM5Ք -545tM bz6IE$/!B,` u@-SmSdPic m#S1FPZfJX(e yvPـ98An([T$ IVnO'rt

计算:(1)(3x-5)²;(2)(-4a+1/2b)².
计算:(1)(3x-5)²;(2)(-4a+1/2b)².

计算:(1)(3x-5)²;(2)(-4a+1/2b)².
(1)
(3x-5)²
=(3x)²-2*(3x)*5+5²
=9x²-30x+25
(2)
(-4a+1/2b)².
=(1/2b-4a)²
=b²/4 -4ab+16a²

计算:(1)(3x-5)²;
=9x²-30x+25
(2)(-4a+1/2b)²
=16a²-4ab+1/4b²
.