(34-5a)(34-5a)+(54+9a)(54+9a)的结果

(34-5a)(34-5a)+(54+9a)(54+9a)
=34^2-34 ×2×5a+25a^2+54^2+54×2×9a+81a^2
=34^2+54^2-340a+972a+25a^2+81a^2
=1156+2916+632a+106a^2
=106a^2+632a+4072
=2(53a^2+316a+2036)