Քառակուսիների տարբերության բանաձևը

Վարժ.1

(p+q)(p-q)=p^2-q^2

(a-b)(a+b)=a^2-b^2

(c+d)(d-c)=c^2-d^2

(y-x)(x-y)=y^2-x^2

(a-3)(3-a)=a^2-9

(2-b)(b-2)=b^2-4

(m+1)(1-m)=m^2-1

(7-n)(7+n)=n^2-49

 

Վարժ.2

71.69=4899

82.78=6396

299.301=89999

498.502=249996

3,01.2,99=8,9999

10,2. 9,8=99,96

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