计算-18÷(-3)²+5×(-1/2)³-(-15)÷5 要是‖A+2‖+(B-3)²=0,求3AB-4B²的值两题是分开的,“要是”前面是一道题,“‖”是绝对值符号!
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/17 02:34:55
![计算-18÷(-3)²+5×(-1/2)³-(-15)÷5 要是‖A+2‖+(B-3)²=0,求3AB-4B²的值两题是分开的,“要是”前面是一道题,“‖”是绝对值符号!](/uploads/image/z/603300-12-0.jpg?t=%E8%AE%A1%E7%AE%97-18%C3%B7%EF%BC%88-3%EF%BC%89%26%23178%3B%2B5%C3%97%EF%BC%88-1%2F2%EF%BC%89%26%23179%3B-%EF%BC%88-15%EF%BC%89%C3%B75+%E8%A6%81%E6%98%AF%E2%80%96A%2B2%E2%80%96%2B%EF%BC%88B-3%EF%BC%89%26%23178%3B%3D0%2C%E6%B1%823AB-4B%26%23178%3B%E7%9A%84%E5%80%BC%E4%B8%A4%E9%A2%98%E6%98%AF%E5%88%86%E5%BC%80%E7%9A%84%EF%BC%8C%E2%80%9C%E8%A6%81%E6%98%AF%E2%80%9D%E5%89%8D%E9%9D%A2%E6%98%AF%E4%B8%80%E9%81%93%E9%A2%98%EF%BC%8C%E2%80%9C%E2%80%96%E2%80%9D%E6%98%AF%E7%BB%9D%E5%AF%B9%E5%80%BC%E7%AC%A6%E5%8F%B7%EF%BC%81)
xRMj@JPt$툉`nH{ؖViEZJqQ"]hrqr(-,2}ofzu=~N]dd&m';I#a)\Ap Nf5V"zu ^h55پDr@ɚF fn=_ΣMe,ǀMb(X|7VıҏQrjB(=!-䒢n! y
"6ߴ, tZIBde *12->@പͦ}f!Oh[#\?r }6'@ly%X
>QweMذ(['ڛ(x
计算-18÷(-3)²+5×(-1/2)³-(-15)÷5 要是‖A+2‖+(B-3)²=0,求3AB-4B²的值两题是分开的,“要是”前面是一道题,“‖”是绝对值符号!
计算-18÷(-3)²+5×(-1/2)³-(-15)÷5 要是‖A+2‖+(B-3)²=0,求3AB-4B²的值
两题是分开的,“要是”前面是一道题,“‖”是绝对值符号!
计算-18÷(-3)²+5×(-1/2)³-(-15)÷5 要是‖A+2‖+(B-3)²=0,求3AB-4B²的值两题是分开的,“要是”前面是一道题,“‖”是绝对值符号!
-18÷(-3)²+5×(-1/2)³-(-15)÷5
=-18÷9+5×(-1/8)+3
=-2-5/8+3
=3/8
‖A+2‖+(B-3)²=0
a=-2 b=3
3ab-4b²
=b(3a-4b)
=3×(-6-12)
=3×(-18)
=-54
自己想
-18÷(-3)²+5×(-1/2)³-(-15)÷5
=-18÷9+5×﹙-1/8﹚+3
=-2+3-5/8
=3/8
‖A+2‖+(B-3)²=0
A+2=0, B-3=0
A=-2, B=3
3AB-4B²=3×﹙-2﹚×3-4×3²=-54