The width of a window is represented by the expression 3x 7. If the area of the window is 18x – 42, what is the height of the window?​

The difference is 5,100m?

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.