It helps immensely if you know your times tables.
a) 36 = 6*6 = 2*3*2*3 = 2^2*3^2
b) 45 = 5*9 = 5*3*3 = 3^2*5
c) 2 is not a common factor; 3^2 is a common factor; 5 is not a common factor. The greatest common factor is 3^2 = 9.
d) The least common multiple can be found a couple of ways.
.. 1) the product of the distinct factors to their highest powers
.. .. .. 2^2 * 3^2 * 5 = 180
.. 2) the product of the numbers divided by their greatest common factor.
.. .. .. 36 * 45 / 9 = 180
Answer:
14
or 
Step-by-step explanation:
Turn your fractions into improper and make them have the same denominator
+
=
Leave it as is or simplify to 14
The sqrt(7) part makes it irrational, so the answer is irrational.
Algebra 1 is a high school course. You learn some of the same things but in algebra it's more complicated.
