一个等腰直角三角形的两条直角边分别是7.2m

Question

如题所述

Answer 1

解：解方程, 此方程的解为x = 1.74
A - B = C，即B = A - C
∴7.2 × 2 - 6x = 3.96
（7×10+2）/10 × 2 - 6x = （3×100+96）/100
72/10 × 2 - 6x = 396/100
72/5 - 6x = 99/25
6x = 72/5 - 99/25
6x = 360/25 - 99/25
6x = 261/25
x = 261/25 ÷ 6
x = 87/50
∴x = 1.74
经检验，7.2×2 - 6 × 1.74 = 3.96符合题意
答：此方程的解为x = 1.74本回答被网友采纳