Question

if
a=3 b=5 find the value of
​

Answer 1

Answer:

480

Step-by-step explanation:

7*5^2*3-3*5*3

7*25*3-15*3

175*3-15*3

525-45

480

Answer 2

• As per the data given in the question, we have to find the value of the expression.

              Given data:- $a=3,\ b=5.$

              To find:- the value of  $7a^{2} b-3ab=?$

              Solution:-

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

• It is the rule used to remember the order of operations to be followed while solving expressions in mathematics.

         where,

               $\begin{array}{l}\mathrm{B}=\text { brackets } \\\mathrm{O}=\text { order of powers or rules } \\\mathrm{D}=\text { division } \\\mathrm{M}=\text { multiplication } \\\mathrm{A}=\text { addition } \\\mathrm{S}=\text { subtraction }\end{array}$

          Therefore,

           $7a^{2} b-3ab\\=7(3^{2})(5)-3(3)(5)\\=7(9)(5)-3(3)(5)\\=315-45\\=270.$

        Hence we will get the value $270.$