Question

if x=3 find the value of 7x² + 3x -2​

Answer 1

Answer:

if x=3 ,The value of 7x² + 3x -2 is 70.

Step-by-step explanation:

To find :- $7x^{2} + 3x -2$

Given:-    $x=3$

Putting value of $x=3$  in $7x^{2} + 3x -2$

$7(3)^{2} +3(3)-2\\ \\= 7(9)+9-2\\ \\ =63+7\\ \\ =70$

Answer 2

• We have to evaluate the above expression by using the given data.

              Given data:-  $x=3.$

              To find:- Value of above expression $7x^{2} +3x-2.$

              Solution:-

• To solve the above equation we will follow the BODMAS rule.

• BODMAS is an order of mathematic operations.

• BODMAS rule is to be followed while solving expressions in mathematics. It stands for,

           B= bracket

           O= order of power or rules

           D= division

           M= multiplication

           A= addition

           S= subtraction

       Now put the value of x in the given equation we get,

       $7x^{2} +3x-2\\=>7(3)^2+3(3)-2\\=>7\times9+9-2\\=>63+7\\=>70$

      Hence we will get the value is $70.$