w2-169=0

36a2= 169

15t2-11t-12= 0

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- Feb 27th 2008, 11:14 AMdbluedsolve by factoring/give an example please
w2-169=0

36a2= 169

15t2-11t-12= 0 - Feb 27th 2008, 11:48 AMgalactus
Please use the ^ sign for powers. As you have it written, the first one means

w times 2.

But anyway, for the first one. Notice the difference of two squares?.

$\displaystyle (w)^{2}-(13)^{2}$. Now, can you factor using the proper form?. (x+y)(x-y). - Feb 28th 2008, 03:55 PMquarks
$\displaystyle 36a^2=169$

Take the square root of both sides.

$\displaystyle \sqrt{36a^2}\ = \sqrt 169$

$\displaystyle 6a=13$

$\displaystyle a= \frac{13}{6}$

For the other one, you can factor it.

$\displaystyle 15t^2-11t-12 = (3t-4)(5t+3)$

And from there, it's easy to solve. - Feb 28th 2008, 04:26 PMtopsquark
- Feb 28th 2008, 04:29 PMquarks
Yeah. Thanks. =) My mistake.