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Express the follwing in the form of a + ...

Express the follwing in the form of a + ib, ` a , b in R i=sqrt ( -1).` State the value of a and b.
`( - sqrt5 + 2 sqrt ( -4) ) + (1 - sqrt ( -9 ))+ (2 + 3i ) (2 - 3i )`

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The correct Answer is:
`a = (23)/(13), b = (15)/(13)`
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