document.write( "Question 203358This question is from textbook Intermediate Algebra
\n" ); document.write( ": HI. This expression is suppose to wrote in a + bi form. I am having some trouble solving it. It's 5i^3/2(square root -4). Thank you very much. \n" ); document.write( "

Algebra.Com's Answer #153431 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

You can put this solution on YOUR website!
5i^3/2(square root -4).
\n" ); document.write( ":
\n" ); document.write( " $\"%285i%5E3%29%2F%282sqrt%28-4%29%29\"$
\n" ); document.write( ":
\n" ); document.write( "i^3 = i^2 * i; i^2 = -1, therefore -1*i = -i
\n" ); document.write( "we have
\n" ); document.write( " $\"%28-5i%29%2F%282sqrt%28-4%29%29\"$
\n" ); document.write( ";
\n" ); document.write( "Extract Square root of neg 1 from the denominator
\n" ); document.write( " $\"%28-5i%29%2F%282i%2Asqrt%284%29%29\"$
\n" ); document.write( ":
\n" ); document.write( " $\"%28-5i%29%2F%282i%2A2%29\"$
\n" ); document.write( ":
\n" ); document.write( " $\"%28-5i%29%2F%284i%29\"$
\n" ); document.write( "Cancel i
\n" ); document.write( " $\"%28-5%29%2F4%29\"$ = -1.25
\n" ); document.write( ":
\n" ); document.write( "You have to write it: -1.25 + 0i \n" ); document.write( "

\n" );