How do you factor #49x^2-144#?
This problem is known as a 'perfect square.' The square root of 49 is 7 and the square root of
Firstly, multiply the first numbers/variables: 7
Secondly, multiply the outer numbers/vars.: 7
Thirdly, multiply the inner numbers/vars.: 7
Lastly, multiply the last numbers/vars.:12
The two number, 84
One CAN'T use this perfect square method IF the equation has a plus instead of a minus.
This is a difference of squares. Use the formula:
Plug in the known values for