Thursday

April 24, 2014

April 24, 2014

Posted by **Sally** on Tuesday, May 18, 2010 at 5:12pm.

- Algebra/trigonometry -
**Reiny**, Tuesday, May 18, 2010 at 5:21pmJust expand it

(3-7i)^2

= (3-7i)(3-7i)

= 9 - 42i + 49i^2 , but i^2 = -1

= 9 - 42i - 49

= -40 - 42i

- Algebra/trigonometry -
**Sally**, Tuesday, May 18, 2010 at 5:26pmokay thank you

**Related Questions**

Trigonometry - okay im still confused on how to do function notation. im not ...

college - Which of the following choices is a solution for: (-3-i)x1 + (1-2i)x2...

Linear Algebra - I previously posted this question under the wrong topic. Which ...

algebra - im not to good at algebra so here goes im supposed to multiply 5.(3.2...

algebra - find an equivalent equation with teh given denominator 7/b= ?/bsquared...

Algebra 1 - Use the power of a product property to simplify the expression. (2)^...

science - I have checked these sites out and they dont answer the question, what...

Math - 1)Write a quadratic equation with integer coefficients that has -4+7i(...

pre-algebra(algebra) - I'm not sure if I have the correct answer to this problem...

Algebra 2 - I can't figure out how to find the n on top of the sigma. I have the...