Represent:
1+7i/(2-i)²
in a + ib form. Where i = √-1
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By rationalising it,
= (1+7i)/(3-4i) × (3+4i)/(3+4i)
= (1+7i)(3+4i)/(3)² - (4i)²
= (3 + 4i + 21i + 28i²)/ 9 + 4
= (3 + 25i - 28)/13
= (-25 + 25i)/13
= (-25/13) + (25i/13) is the a + ib form
where, a = (-25/13) and b = (25/13).
OjasT:
i can do rest
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