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(x﹣y)4 (y﹣x)4 ﹣(x﹣y)4 (x+y)4
9x3﹣4x2, 9x4+4, 9x3+4x, 9x4﹣4
3x-5x=2x 3x2+x=4x3 -7a+4b=-11ab -3ab2-ab2= -4ab
8x+4=12x 4y﹣4=y 4y﹣3y=y 3x﹣x=3
#define f(x) 4*x*x+3*x+2 #define f 4*x*x+3*x+2 #define f(a) (4*a*a+3*a+2) #define (4*a*a+3*a+2) f(a)
(x+2)(x-6) (x-2)(x+6) (x+3)(x-4) (x-3)(x+4)
2x2-4x2=-2 3x+x=3x2 3x·x=3x2 4x6÷2x2=2x3
(x3)4=x7 x3•x4=x12 (﹣3x)2=9x2 2x2+x2=3x4