Question

let A+B = [-7/9 4/3] and A-B = [2/0 0/2]. find A and B.​

Answer 1

Answer:

Using the identity

${(a + b)}^{2} = (a + b)(a - b)$

${(a + b)}^{2} = ( \frac{ - 7}{9} \times \frac{4}{3} )( \frac{2}{0} \times \frac{0}{2} )$

${(a + b)}^{2} = \frac{ - 28}{27} \times \frac{0}{0}$

${(a + b)}^{2} = \frac{ - 28}{27}$