sqrt(3x-5)=sqrt(2x+3)

解答

3 x - 5 = 2 x + 3

x = 8

求解步骤

3 x - 5 = 2 x + 3

两边进行平方:

3 x - 5 = 2 x + 3

3 x - 5 = 2 x + 3

解

3 x - 5 = 2 x + 3 : x = 8

x = 8

验证解:

x = 8

真

解是

x = 8

x^{2} - 5 x + 6 = 0

2 x + 4 x - 7 = x + 1

x + x + 1 = 2 x + 1

so l v e f or f, f^{- 1} (2) = 22 - 18 x

7 x + 1 - x = 1