Question

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Answer 1

Step-by-step explanation:

1. 49x² - 9²

= (7x)² - (9)²

= (7x+9)(7x-9)

using identify

a² - b² = (a+b)(a-b)

2. 16x² - 25

= (4x)² - (5)²

= (4x+5)(4x-5)

using identify

a² - b² = (a+b)(a-b)

3. x² - 2x + 1

= (x)² - 2 × 1 × x + (1)²

= (x-1)²

= (x-1)(x-1)

using identify

a² - 2ab + b² = (a-b)²

4. 9x² - 6x + 1

= (3x)² - 2 × 3x × 1 + (1)²

= (3x-1)²

= (3x-1)(3x-1)

using identify

a² - 2ab + b² = (a-b)²

5. x² - (y + z)²

= (x)² - (y+z)²

= (x+(y+z))(x-(y+z))

= (x+y+z)(x-y-z)

using identify

a² - b² = (a+b)(a-b)

Hope it helps you............

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