Question

Question -1:
5x2 - 2xy + 3y2, x2 – 3xy, - x2 + 5xy are three algebraic expressions-
a) How many terms are there in the first expression and what are they?
b) Determine the sum of the three expressions.
c) If x = 3, y = 2, find the value of the difference between 1st and 3rd
expressions.​

Answer 1

Answer:

a) three terms

x and y are variables

b) the sum is : 5x^2 +3y^2

c) value of first expression is 45

value of third expression is 39

so ,

difference : 45-39 = 6