Question

Factorise the equation
9x*2- 64

Answer 1

2(9x-32)

Explanation:

9x(2)-64

18x-64

=2(9x-32)

Answer 2

`{9x}^(2) - 64`

• We have to factorise it using the identity: x² - y² = (x - y)(x + y)
• We know 3² = 9 and 8² = 64.

`{(3x)}^(2) - (8)^(2) \\`

• Now, use the identity I have mentioned.

`(3x - 8)(3x + 8)`

Answer:

(3x - 8)(3x + 8)

Hope you could understand.

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