The value of 3x(7x – 5) + 3 for x = 5
Answers
Answer:
3x(7x-5)+3. for x = 5
Putting values in above equation
3×5(7×5-5)+3
=3×5(30)+3
=15×30+3
=450+3
=453
Step-by-step explanation:
Bodmas means which things we have tosolve first in any equation
B stands for bracket
o stands for of
d stands for divide
m stands for multiply
a stands for additon
s stands for subtraction
Question-The value of 3x(7x – 5) + 3 for x = 5
Answer
Let's simplify step-by-step.
3x(7x−5)+3
Distribute:
=(3x) x (7x)+(3x) x (−5)+3
=21x²+−15x+3
Answer:
=21x²−15x+3
Evaluate for x=5
=21(5²)−(15) x (5)+3
=21(5²)−(15) x (5)+3
=21(25)−(15) x (5)+3
=453
Extra Information:
BODMAS means which things we have to solve first in any equation
B stands for bracket
o stands for of
d stands for divide
m stands for multiply
a stands for addition
s stands for subtraction
What is an algebraic expression?
- An Algebraic expression is an expression that you will see most often once you start Algebra. In Algebra we work with variables and numerals.
- A variable is a symbol, usually a letter, that represents one or more numbers.
- Thus, an algebraic expression consists of numbers, variables, and operations.
What is evaluation in algebraic expressions
- A variable is a letter, for example x, y or z, that represents an unspecified number.
6+x=12
- To evaluate an algebraic expression, you have to substitute a number for each variable and perform the arithmetic operations. In the example above, the variable x is equal to 6 since 6 + 6 = 12.
- If we know the value of our variables, we can replace the variables with their values and then evaluate the expression.
Example
Calculate the following expression for x=3 and z=2
6z+4x=?
Solution: Replace x with 3 and z with 2 to evaluate the expression.
6z+4x=?
6⋅2+4⋅3=?
12+12=24