解方程:4(x-2)(x+5)-(2x-3)(2x+1)=5.

解方程:4(x-2)(x+5)-(2x-3)(2x+1)=5.

4(x2+3x-10)-(4x2-4x-3)=5,4x2+12x-40-4x2+4x+3=5,16x=42,解得x=218.