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nata0808 [166]
3 years ago
14

Using a suitable identity solve the following (7a-9b)(7a-9b)

Mathematics
1 answer:
yuradex [85]3 years ago
4 0

Answer:

49a^2 - 126ab + 81 ^2

Step-by-step explanation:

Suitable identity = (a-b)(a-b) = a^2 - 2ab + b^2

So, to solve this.

(7a-9b)(7a-9b) = 49a^2 - 126ab + 81b^2

Hope this helps

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