Question

Factor the polynomial completely.

2a^2 - 162

Show steps please! :)

Answer 1

2(a^2-81)
=2(a^2-9^2)
=2(a+9)(a-9)

Answer 2

Thank you :)

Answer 3

Remember:
\[a^2 - b^2 = (a+b)(a-b)\]

Answer 4

The sum of squares.. Ugh, so many formulas. Lol, thank you! :)

Answer 5

2(a^2 - 81)
= 2(a + 9)(a + 9)

162 is positive, adding a negative would reduce it.

Answer 6

No, it is subtraction of squares...
He he he...

Answer 7

Difference of squares*

Thanks @Compassionate :)

Answer 8

Haha, yeah.. I just caught myself.. :\

Answer 9

It happens sometimes...

Answer 10

@Compassionate i think waterneyes is rigth

Answer 11

http://tutorial.math.lamar.edu/pdf/Algebra_Cheat_Sheet_Reduced.pdf @LynnMichael

Answer 12

Oh, sweet! Thank you so much @Outkast3r09 !! :)

Answer 13

no problem