Question

Which of the following is the correct notation for √-98+71

A. 7i √2+71
B. 71+7i √2
C.-7i √2++71
D.7 √2+71i

Answer 1

`\large\boxed{A.\ 7i\sqrt2+71}`

Explanation:

`\text{Use}\\\\i=√(-1)\\\\√(ab)=√(a)\cdot√(b)\\----------------------\\\\√(-98)+71=√((-1)(49)(2))+71=√(-1)\cdot√(49)\cdot\sqrt2+71\\\\=i\cdoy7\cdot\sqrt2+71=7i\sqrt2+71`