Question

Find the value of the expression : 5x2 +3xy– 2 when x = 2 and y = -1​

Answer 1

Answer:

$12$

Step-by-step explanation:

5x2 +3xy– 2 when x = 2 and y = -1​

$= 5(2^{2}) + 3(2)(-1) - 2$

$= 5(4) + -6 -2$

$= 20 - 6-2$

$= 20-8$

$= 12$

Please mark me as Brainliest

Answer 2

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

           Given data:- $x=2,y=-1.$

           To find:-Value of the given expression $5x2+3xy-2.$

           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,

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

Now put the value of x and y in the given equation.

Therefore,

$5x2+3xy-2\\=5(2)2+3(2)(-1)-2\\=20+3(-2)-2\\=20-6-2\\=12.$

Hence we will get the value $12.$