### Home > CCA2 > Chapter Ch11 > Lesson 11.2.3 > Problem 11-69

11-69.

Let and

*. Calculate the following values and simplify to*

*form.*

Substitute the known values into the equation for

and.Combine like terms.

Simplify.

Is this in

form? How can you tell?

Use the same method as part (a).

Remember that

. Use a generic rectangle to multiply the binomials.