Question

(y − x - 3) (y + x − 3)

Answer 1

$a - b \times a + b \\ = y {3}^$

Answer 2

Answer:

a = (y - x)

b = 3

(y - x - 3)(y + x - 3)

[(y - x) + 3][(y + x) - 3]

(a + b)(a - b) = a² - b²

⇒ (y - x)² - (3)²

y² - 2xy + x² - 9 Ans

Hope it helps

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