解方程(2x+1)(2x-1)+3(x+2)(x-2)=(7x-1)(7x+1)

解方程(2x+1)(2x-1)+3(x+2)(x-2)=(7x-1)(7x+1)
解方程(2x+1)(2x-1)+3(x+2)(x-2)=(7x-1)(7x+1)

解方程(2x+1)(2x-1)+3(x+2)(x-2)=(7x-1)(7x+1)
(2x+1)(2x-1)+3(x+2)(x-2)=(7x-1)(7x+1)
4x²-1+3*（x²-4）=49x²-1
4x²+3x²-12=49x²
-12=42x²
x²=-4/21
方程无解

(2x+1)(2x-1)+3(x+2)(x-2)=(7x-1)(7x+1)
（4x^2-1)+3(x^2-4)=49x^2-1
7x^2-13=49x^2-1
-12=42x^2
x^2=-2/7
显然方程无解。