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I feel like I should know this already and feel foolish having to ask, however can someone please explain why:

[tex] a^2 - \frac {b^2a^2} {c^2} = d [/tex] is the same as: [tex] a^2 (1 - \frac {b^2} {c^2}) = d [/tex]

Again, sorry if this really is something incredibly obvious, for some reason I am just blanking. All I need to know is what I need to look up to understand

Thank you in advance and this is my first post so I am sorry if this is in the wrong area or anything like that,

Sam

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# Trouble understanding why two equations give the same result

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