Was studying a little for maths.. in the middle of a question I've hit a brain fade. m^2 + 80 = 0.25m^2 The next step in the answers is 0.75m^2 = 80 What did they do to go from there to here?
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Originally Posted by Mschumi Was studying a little for maths.. in the middle of a question I've hit a brain fade. m^2 + 80 = 0.25m^2 The next step in the answers is 0.75m^2 = 80 What did they do to go from there to here? $\displaystyle m^2+80=.25m^2$ Subtract $\displaystyle .25m^2$ from both sides $\displaystyle .75m^2+80=0$ Now subtract 80 from both sides Being as this won't be what you posted, I presume you actually meant $\displaystyle m^2-80=.25m^2$ note the - sign
Originally Posted by Mschumi Was studying a little for maths.. in the middle of a question I've hit a brain fade. m^2 + 80 = 0.25m^2 The next step in the answers is 0.75m^2 = 80 What did they do to go from there to here? Subtract $\displaystyle 0.25m^2$ from each side, and add 80 to each side; that is: $\displaystyle m^2-80=0.25m^2 \Leftrightarrow m^2-80-0.25m^2 = 0.25m^2-0.25m^2 \Leftrightarrow$ $\displaystyle (1-0.25)m^2-80 = 0 \Rightarrow 0.75m^2=80$
Yup meant to have the $\displaystyle -$. Thank You for help.
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