Question

(49x ^ 2)/144 - (16y ^ 2)/25​

Answer 1

Answer:

Explanation:

This problem is known as a 'perfect square.' The square root of 49 is 7 and the square root of

x

2

is

x

. The next number, 144, is also a perfect square and the answer to that is 12.

Firstly, multiply the first numbers/variables: 7

x

⋅

7

x

=49

x

2

Secondly, multiply the outer numbers/vars.: 7

x

⋅

-12=-84

x

Thirdly, multiply the inner numbers/vars.: 7

x

⋅

12=84

x

Lastly, multiply the last numbers/vars.:12

⋅

12=144

The two number, 84

x

and 84

x

, cancel themselves out and leaves one with 49

x

-144

One CAN'T use this perfect square method IF the equation has a plus instead of a minus.

Step-by-step explanation:

Answer 2

Step-by-step explanation:

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