Question

(a + b)* (a - b) =?
(a - b) * (a-b)=?
(a + b) * (a+b) =?
(a - b) * (a - b)=?
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Answer 1

$\large{\underline{\underline{\bf{Solution:-}}}}$

➵ (a + b)(a - b) = a²- b²

➵ (a - b)(a - b) = (a - b)²

➵ (a + b)(a + b) = (a + b)²

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Answer 2

Question:-

• (a + b) × (a - b) =
• (a - b) × (a - b) =
• (a + b) × (a+b) =

Solution:-

• $(a + b)(a - b) = {a}^{2} - {b}^{2}$
• $(a - b)(a - b) = {(a - b)}^{2}$ $= > {a}^{2} + {b}^{2} - 2ab$
• $(a + b)(a + b) = {(a + b)}^{2}$ $= > {a}^{2} + {b}^{2} + 2ab$