Question

3. Find the missing part.
(a+_)² = _+2ac +c²
a.
2
2
= m² ______+ n²
+14c+_
b. (__+_)²
C.
c. (c+7)² =
d. (__)² = x² +9
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Answer 1

Ответ:

(а+с)²=а²+2ас+с²

m²+2mn+n²

49+14c+c²

(c+7)²=c²+14c+49