SOLUTION: Hi, would you help me solve this problem, please? {{{ (-8-sqrt(-2))^2 }}} Express result in standard form. Leave answers in terms of square roots (no decimals). I FOILed ou

Algebra ->  Square-cubic-other-roots -> SOLUTION: Hi, would you help me solve this problem, please? {{{ (-8-sqrt(-2))^2 }}} Express result in standard form. Leave answers in terms of square roots (no decimals). I FOILed ou      Log On


   

Question 904016: Hi, would you help me solve this problem, please?
+%28-8-sqrt%28-2%29%29%5E2+ Express result in standard form. Leave answers in terms of square roots (no decimals).
I FOILed out the two parenthesis to get +64+%2B+16i+%2B+16i+%2B+4i%5E2%29+
got to +60%2B32i+ but the online homework system says this is incorrect so I must have messed up along the way.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
+%28-8-sqrt%28-2%29%29%5E2+
= +%28-8+-+isqrt%282%29%29%5E2+
= 64+%2B+16isqrt%282%29+%2B+2i%5E2
= 62+%2B+i%2A16sqrt%282%29
===========================
I FOILed out the two parenthesis to get +64+%2B+16i+%2B+16i+%2B+4i%5E2%29+
You left out the sqrt(2)