Question

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Answer 1

Answer:

4

Step-by-step explanation:

(a+b)(a-b) = a²-b²

(2)(2) = a²-b²

a²-b² = 4

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Answer 2

Given,

a + b = 2 & a - b = 2

a + b = 2 & a - b = 2So, a² - b² = (a + b)(a - b)

a + b = 2 & a - b = 2So, a² - b² = (a + b)(a - b)→ a² - b² = 2 x 2

a + b = 2 & a - b = 2So, a² - b² = (a + b)(a - b)→ a² - b² = 2 x 2Hence, a² - b² = 4 __________(Ans.)

So, 2nd option is correct.