169.
(m+n)2=(m+n)(m+n)=m2+2mn+n2
(2+x)2=(2+x)(2+x)=4+4x+x2
(y+4)2=(y+4)(y+4)=y2+8y+16
(1+p)2=(1+p)(1+p)=1+2p+p2
182.
(a-b)2=(a-b)(a-b)=a2-2ab+b2
(x-3)2=(x-3)(x-3)=x2-6x+9
(1-m)2=(1-m)(1-m)=1-2m+m2
(5+p)2=(5+p)(5+p)=25+10p+p2
206.
(p+q)(p-q)=p2-pq+pq-q2=p2-q2
(a-b)(a+b)=a2+ab-ab-b2=a2-b2
(c+d)(d-c)=cd-c2+d2-cd=-c2+d2
(y-x)(x+y)=xy+y2-x2-xy=y2-x2
Միքայել Հովհաննիսյանի Բլոգ 