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x2﹣4 x2﹣2 x2﹣4x﹣4 x2﹣4x+4
#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)
3x2-2x2=1 x+x=x2 4x8÷2x2=2x4 x·x=x2
(x+2)(x-6) (x-2)(x+6) (x+3)(x-4) (x-3)(x+4)
4x+5 x2-4x-5 -4x-5 x2-4x+5
x6÷x3=x2B (x-1)2=x2-1 x4+x4=x8 (x-1)2=x2-2x+1