Spencer drew two angles. The smaller angle measures 56° less than the larger angle. The measure of the smaller angle is 128º.
Let x represent the measure of the larger angle. Which equation models the problem?
X - 56 = 128
x + 56 = 128
Solve this equation to find the measure of the larger angle.

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.