Solve for n: 3xn-9=6y
1 answer:
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Answer: C: 12-7x
Step-by-step explanation:
This expression is a good example of the difference of two squares, as 144 is the square of 12, while 49x² is the square of 7x.
Any difference of two squares can be factored into the sum of their square roots times the difference of their square roots
.
Let's factor our expression.
Out of all the options given, only is a factor. Hence, option C is correct.
If the problem was written x + 4x. We would know to add like the coefficients together and get 5x same thing with the radicals.
