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(x+2)(x-2)=x2-2 (2a+b)(-2a+b)=4a2-b2 (2x+3)(2x-3)=2x2-9 (3ab+1)(3ab-1)=9a2b2-1
(2a-1)2=4a2-1 3a6÷3a3=a2 (-ab2) 4=-a4b6 -2a+(2a-1)=-1
2a+3b=5ab (x+2)2=x2+4 (ab3)2=ab6 (﹣1)0=1
2+a=2a 2a﹣3a=1 3a+2b=5ab 5ab﹣ab=4ab
2+a=2a 2a﹣3a=﹣1 (﹣a)2•a3=a5 8ab÷4ab=2ab
(AB/2)^(1/2) (2/AB)^(1/2) (AB/2) ² (2/AB) ²
2a+3b=5ab; a3-a2=a; a2+2a2=3a2; (a-1)0=1.
(-p2q)3=-p5q3 (12a2b3c)÷(6ab2)=2ab 3m2÷(3m-1)=m-3m2 (x2-4x)x-1=x-4
2a+3b=5ab (﹣1)0=1 (ab3)2=ab6 (x+2)2=x2+4
(-p2q)3=-p5q3 12a2b3c÷6ab2=2ab 3m2÷(3m-1)=m-3m2 (x2-4x)·x-1=x-4