Question

If x=-2, y = 7 find the value 3 x² + 2y² + 5xy - 7 ​

Answer 1

Answer:

40

Step-by-step explanation

put the values

=$3(-2^{2})+2(7^{2})+5(-2)(7)$

=3(4) + 2((49) + 5(-14)

=12+98-70

=40

Answer 2

Answer:

We will get the value is 33.

Step-by-step explanation:

• As per the question we have to evaluate the given data.

        Given data:-  $x=-2 ,\ y=7.$

        To find:- Value of $3x^{2} +2y^{2} +5xy-7.$

        Solution:-

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

• BODMAS is an order of mathematic operations.

• It stands for,

           B= bracket

           O= order of power or rules

           D= division

           M= multiplication

           A= addition

           S= subtraction

       Now put the value x and y in $3x^{2} +2y^{2} +5xy-7.$

        $3x^{2} +2y^{2} +5xy-7\\=>3(-2)^2+2(7)^{2}+5(-2)(7)-7\\=>3(4)+2(49)+5(-14)-7\\=>12+98+(-77)\\=>110+(-77)\\=>33$