Question

find the product –2a (ab + b²) and find its value for a=2 , b=4.​

Answer 1

Answer:

2*2(2*4+4²)

4(6+16)

18+64 ans

Answer 2

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

          Given data:- $a=2,b=4.$

          To find:- Value of above expression $-2 a\left(a b+b^{2}\right).$

          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 a and b  in the given equation we get,

        $-2 a(a b+b^{2})\\\Rightarrow -2(2)((2)(4)+4^{2}) \\\Rightarrow -4(8+16)\\\Rightarrow -4(24)\\\Rightarrow -96.$

   Hence we will get the value $-96.$