M-5 nbsp- i-2m2-5m ii- nbsp- nbsp-11m nbsp- nbsp- nbsp- 7 nbsp- nbsp- nbsp- nbsp- nbsp- 2

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(x±a)(x±b) = x²±(a+b)x+ab.

m=-5 nbsp; ...

Question

m=-5
i)2m²-5m
ii) 11m - 7
2

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Simplify the following expressions :

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(ii) $(5 + \sqrt{7}) (5 - \sqrt{7})$

(iii) $(\sqrt{8} - \sqrt{2}) (\sqrt{8} + \sqrt{2})$

(iv) $(3 + \sqrt{3}) (3 - \sqrt{3})$

(v) $(\sqrt{5} - \sqrt{2}) (\sqrt{5} + \sqrt{2})$

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