9(x-3)(x+4)=(2x-1)(2x+1)+5(x-2)^2我算的都要吐血了...

9(x-3)(x+4)=(2x-1)(2x+1)+5(x-2)^2
9(x^2+x-12)=4x^2-1+5(x^2-4x+4)
9x^2-4x^2-5x^2+9x+20x-108-19=0
29x=127 ,x=127/29

9（x平方+x-12）=4x平方-5（x平方-4x+4）
9x-108=-20x+19
x=127/29

9(x-3)(x+4)=(2x-1)(2x+1)+5(x-2)^2
9(x-3)(x+4)=4x^2-1+5x^2-20x+20
9x^2+9x-12*9=9x^2-20x+19
9x-108=-20x+19
29x=127
x=127/29