Julo considers the reaction of the triangle
What is the correct cross product that he should use to solve for the missing dimension?
(12) = 217
821) = 122
(128) = 12%
(1221) = x

The surface area would be 576 because you multiply all the numbers then multiply that number by 6

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.