1(1)原式=2m^3-2mn+2m
(2)原式=4x^2+8x+4-2x^2+50=2x^2+8x+54
(3)原式=x^2-1+2=x^2+1
(4)原式=4a^2-4ab+b^2+8ab=4a^2+4ab+b^2
2、(1)x^2-9-(x^2+5x+4)=2
-5x=15
x=-3
(2)4x^2-12x+9=4x^2-1
-12x=-10
x=5/6
1(1)原式=2m^3-2mn+2m
(2)原式=4x^2+8x+4-2x^2+50=2x^2+8x+54
(3)原式=x^2-1+2=x^2+1
(4)原式=4a^2-4ab+b^2+8ab=4a^2+4ab+b^2
2、(1)x^2-9-(x^2+5x+4)=2
-5x=15
x=-3
(2)4x^2-12x+9=4x^2-1
-12x=-10
x=5/6