could someone help me with math?

Question

Multiply the following binomials.

(7a+5)(7a-5)

Answer 1

Hello, thank you for taking the time to post your question!

You want to FOIL it out, meaning multiplying together the First, Outer, Inner, and Last terms

(7a + 5)(7a – 5)

=49a^2 + 35a – 35a – 25

=49a^2 - 25

I hope that helps get you moving in the right direction! Feel free to reach out if you have any additional questions beyond that :)

Answer 2

                                                 7a  +  5

 

                                                  7a  -5                  

                                           __________ 

                                           49a^2   -35a            Multiply 7a b7 7a first  then multiply -5 by 7a

                                                       +35a                                                                        +5 by 7a

                                                                  -25      Multiply +5  by  -5   = -25

                                        ________________                                                                           

                                          49a^2        -25           ------>    Ansr

 

 

                    Hope this helps!

 

                        2/16/16