Saturday

July 26, 2014

July 26, 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**

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

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

Trigonometry - What is cos (pi/2 - x) secx using the fundamental identities to ...

calculus - The question I'm having problems with is If f(x)=3x^2+7x+2, find f'(4...

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

Algebra - Divide the rational expression. Express the quotient as a rational ...

Algebra 2 - Write the expression as a complex number in standard form. 3-3i/4i I...

trigonometry - this is exactly how the question is written and i tried to solve ...

Algebra II - Please help! I am stuck on this one. Need to simplify the ...

Trigonometry - I can't figure out the answer to this problem Use a right ...