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02-08-2017
Mathematics

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Solve by taking square roots: x^2 - 40 = 9

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02-08-2017

To solve for x^2 - 40 = 9, take the square roots of both sides and solve.
The answer is x = 7, -7.

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Аноним Аноним

02-08-2017

[tex] x^{2} -40= 9[/tex]

[tex] x^{2} = 49[/tex]

[tex] \sqrt{ x^{2} } = \sqrt{49} [/tex]

x = +7 or -7

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