(1)The expanded form of (a+b)×(a-b) is
(a) a2+b2. (b) a2+2ab+b2. (c) a2-b2. (d) a2-2ab+b2
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The expand form of (a + b)(a - b) = (a² - b²).
Answered by
1
Answer:
Step-by-step explanation:
= a2 - 2ab + b2. Therefore, (a + b)2 + (a - b)2. = a2 + 2ab + b2 + a2 - 2ab + b2.
= 2(a2 + b2), and. (a + b)2 - (a - b)2. = a2 + 2ab + b2 - {a2 - 2ab + b2}
= 4ab. Corollaries: (i) (a + b)2 - 2ab = a2 + b2.
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