Friday

February 27, 2015

February 27, 2015

Posted by **mada** on Tuesday, April 6, 2010 at 10:44pm.

- algebra maginary numbers -
**Reiny**, Tuesday, April 6, 2010 at 11:27pmjust expand it as if the i was a variable

(3+4i)(3-4i)

= 9 - 12i + 12i -12i^2, now remember i^2 = -1

= 9 - 12(-1)

= 9+12

= 21

- algebra maginary numbers -
**mada**, Tuesday, April 6, 2010 at 11:33pmwait when you factor it wouldnt it be 9-12i+12i-16i^2

- algebra maginary numbers -
**Reiny**, Tuesday, April 6, 2010 at 11:36pmof course, my silly error

- algebra maginary numbers -
**mada**, Tuesday, April 6, 2010 at 11:41pmits totally cool you have helped alot :)

**Answer this Question**

**Related Questions**

algebra - List all the numbers from the given set that are, a.natural numbers b....

Algebra - To which subset of rel numbers does the number -22 belong? whole ...

Algebra - 28. Use the Distributive Property to simplify x(4x^2 + x + 4) Is it 4x...

Algebra - What type of number is -22?? choose all that apply... whole numbers ...

Int Algebra - The difference of two numbers is 7. The sum of the numbers is -1. ...

advance algebra - The sum of two numbers is 81, one of the numbers is 9 more ...

honors algebra 2 - the product of two negative numbers is 338. one of the ...

algebra - 3 numbers are in the ratio 3:5:7. if the larger number is multiplied ...

Algebra - Order the following numbers from least to greatest. √5, -0.1, (-...

algebra - true or false 1. fraction cant be written as decimal. 2. natural ...