The perimeter of a triangle is 51 cm. the lenghs of its sides are consecutive odd integers. find the lengths of all three sides. write and equation and solve.

Equation:
 P=15+17+19=51
The lengths of the sides are 15 cm , 17 cm and 19 cm. 

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.