What is the value of 7x squared + 2x when x = 3

The value of equation is 69   at x=3

Step-by-step explanation:

Given Equation:

We have to find the value of the expression at x=3

Putting the value of 'x' in the given equation.

                 =

                 =

The value of the above expression at x=3 is 69.

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.