Advertisements
Advertisements
Question
If x = 2 and y = 3, then find the value of the following expressions
2x – 3y
Advertisements
Solution
Given: x = 2, y = 3
2x – 3y = 2(2) – 3(3) = 4 – 9
= 4 + (Additive inverse of 9)
= 4 + (– 9)
= – 5
APPEARS IN
RELATED QUESTIONS
Get the algebraic expression in the following case using variables, constants and arithmetic operations.
One-half of the sum of numbers x and y.
Factorize a2 + 4b2 - 4ab - 4c2
Factorize `x^2 - sqrt3x - 6`
Factorize `9(2a - b)^2 - 4(2a - b) - 13`
Simplify `(173 xx 173 xx 173 xx 127 xx 127 xx 127)/(173 xx 173 xx 173 xx 127 xx 127 xx 127)`
Factorize `8/27 x^3 + 1 + 4/3 x^2 + 2x`
Factorize 8a3 – 27b3 – 36a2b + 54ab2
Factorize a3 x3 - 3a2bx2 + 3ab2 x - b3
What must be added to the following expression to make it a whole square?
4x2 − 12x + 7
Multiply: 9x2 + 25y2 + 15xy + 12x − 20y + 16 by 3x − 5y + 4
If (x + y)3 − (x − y)3 − 6y(x2 − y2) = ky2, then k =
Multiply: (6x - 2y)(3x - y)
Divide: x2 + 4xy + 4y2 by x + 2y
Divide: 3y3 - 9ay2 - 6ab2y by -3y
Write the coefficient of x2 and x in the following polynomials
πx2 – x + 2
The variable in the expression 16x – 7 is __________
Write the variables, constant and terms of the following expression
7p – 4q + 5
Give an algebraic equation for the following statement:
“The difference between the area and perimeter of a rectangle is 20”.
A triangle is made up of 2 red sticks and 1 blue sticks 
. The length of a red stick is given by r and that of a blue stick is given by b. Using this information, write an expression for the total length of sticks in the pattern given below:
Express the following properties with variables x, y and z.
Commutative property of addition
