206.
ա) (p + q)(p − q) = p2-q2
բ) (a − b)(a + b) = a2-b2
գ) (c + d)(d − c) = c2-d2
դ) (y − x)(x + y) = y2-x2
ե) (a − 3)(3 + a) = a2-32
զ) (2 − b)(b + 2) = 22-b2
է) (m + 1)(m − 1) = m2-1
ը) (7 − n)(7 + n) = 72-n2
206.
ա) (p + q)(p − q) = p2-q2
բ) (a − b)(a + b) = a2-b2
գ) (c + d)(d − c) = c2-d2
դ) (y − x)(x + y) = y2-x2
ե) (a − 3)(3 + a) = a2-32
զ) (2 − b)(b + 2) = 22-b2
է) (m + 1)(m − 1) = m2-1
ը) (7 − n)(7 + n) = 72-n2
Հարութ Սարգսյանի բլոգ 