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Romashka [77]
2 years ago
5

What is: Factorise 7−x^2

Mathematics
1 answer:
love history [14]2 years ago
5 0

Answer:

(\sqrt{7} - x )(\sqrt{7} + x )

Step-by-step explanation:

Using the difference of squares

a² - b² = (a - b)(a + b) , then

7 - x²

= (\sqrt{7} )² - x²

= (\sqrt{7} - x)(\sqrt{7} + x)

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