Question

Factorise:
1.x²-3²
2.k²-1​

Answer 1

Step-by-step explanation:

1. (x+3) (x-3)
2. (k+1) (k-1)

Answer 2

Answer :

• Identity used = a² - b² = (a + b) (a - b)

♪ Solution 1

= x² - 3²

= (x + a ) (x - b)

♪ Solution 2

= k² - 1

= k² - (1)²

= k² - 1²

= (k + 1) (k - 1)

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