Question

Show That mula1" title=" {a }^{2} + {b}^{2} = 8" alt=" {a }^{2} + {b}^{2} = 8" align="absmiddle" class="latex-formula">
​

Answer 1

Answer:

Please see the attached picture for the full solution.

*From the 4th line of the 1st image, you could also expand it using

(a +b)²= a² +2ab +b² and

(a -b)²= a² -2ab +b².

When squaring a fraction, square both the denominator and numerator.

➣(a/b)²= a²/b²