Question

if p bar + q bar= r bar and p bar -q bar = s bar, then r square + s square is equal to
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Answer 1

Answer:

${p}^{ - } + {q}^{ - } = {r}^{ - } .........(i) \\ {p}^{ - } - {q}^{ - } = {s}^{ - } \: ............(ii) \\ add \: (i) \: and \: (ii) \: we \: get \\ {p}^{ - } + {p}^{ - } + {q}^{ - } - {q}^{ - } = {r}^{ - } + {s}^{ - } \\ 2 {p}^{ - } = {r}^{ - } + {s}^{ - }$

Answer 2

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