Use picture Question 4: Is this equation an identity? Explain or show how you know *
2 points
at +64 = (a + b) (a' - ab - ab+ b3)
No. When I expanded the expression on the right side, I got an expression different
from the one on the left side.
Yes. When I expanded the expression on the right side, I got the same expression as
the left side.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.