Question

If \[p = - 2\], find the value of \[4p + 7\]

Answer 1

Hint: In the question, we need to find the value of \[4p + 7\] . By substituting the value of \[p\] in the question we can find the value. We can directly substitute the variable value in the expression given .Then by simplifying, we get the value of the question.

Complete answer:
Given, \[p = - 2\]
We need to find the value of \[4p + 7\]
By substituting the value of \[p\] in the equation,
\[4p + 7 = 4\left( - 2 \right) + 7\]
\[= - 8 + 7\]
By simplifying,
We get
\[4p + 7 = - 1\]
Final answer :
The value of \[4p + 7 = - 1\].

Additional information :
Mathematically, there are three types of algebraic expression namely monomial expression, binomial expression and polynomial expression. Monomial expression is nothing but having only one term , binomial expression with two terms and finally polynomial with more than two terms.

Note:
The concept used to solve this problem is evaluation of algebraic expressions by substituting the value for the variable. We generally forget the ‘–‘ sign and substitute it as \[+ 1\] by mistake. By this the whole answer will change . So solve the sum carefully in order to get the exact answer. An algebraic expression is built up with integers, constants, variables and mathematical operations (addition, subtraction, multiplication, division etc… ) . Any linear calculations requiring one or more than one variable that can be solved with the help of linear equations. A simple example of algebraic expression is \[(x-20)\] . Here \[x\] is the variable and \[-20\] is the constant.