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a rectangle has a perimeter of (26x+16)cm and an area of (42x^2+51x+15)cm^2. find the dimensions of the rectangle in terms of x.

What am i doing here. add?

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.