1.

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

Answer»

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}


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