Question

x³ − 3x²y + 2xy² + 8xy + 9 when x = −3 and y = 1

Answer 1

Answer:

-75

Step-by-step explanation:

(-3)³-3(-3)²(1)+2(-3)(1)²+8(-3)(1)+9

-27-3(9)-6-24+9

-27-27-30+9

-84-9=-75

so -75 is the right answer

Answer 2

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

              Given data:-$x=-3,y=1.$

              To find:- $x^{3}-3 x^{2} y+2 x y^{2}+8 x y+9.$

              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 x and y in the given equation we get,

            $x^{3}-3 x^{2} y+2 x y^{2}+8 x y+9\\=>(-3)^{3}-3(-3)^{2} (1)+2(-3)(1)^{2} +8(-3)(1)+9\\=>-54+-6+-24+9\\=>-75.$

      Hence we will get the value is $-75.$