Question

how do u solve 25y^2 - 49w^2

Answer 1

are you familiar with the difference of squares? \[\huge a^2 - b^2 = (a+b)(a-b)\]

Answer 2

a little yes

Answer 3

good. so what is \(\sqrt{25y^2}\)

Answer 4

5y... idk

Answer 5

yes it's 5y

Answer 6

now what is \(\sqrt{49w^2}\)

Answer 7

7w

Answer 8

right. so...

a = 5y

b = 7w

substitute that into (a+b)(a-b) what do you get?

Answer 9

do you do foil?

Answer 10

no.. just put 5y into a and 7w into b in (a+b)(a-b)

Answer 11

and thats your whole answer?

Answer 12

yes

Answer 13

oh... i feel stupid! :) thanks!

Answer 14

welcome