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Question Number 133371 by I want to learn more last updated on 21/Feb/21

Answered by mr W last updated on 22/Feb/21

Commented by mr W last updated on 21/Feb/21

$$x=\sqrt{5^2+3^2-2\times 5\times 3\times \cos 120°}$$$$=\sqrt{25+9+15}$$$$=7$$

Commented by I want to learn more last updated on 23/Feb/21

$$\mathrm{Thanks}\mathrm{sir}.\mathrm{I}\mathrm{appreciate}.$$

Commented by Tawa11 last updated on 14/Sep/21

$$\mathrm{nice}$$

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