Find $a$ such that $ax^2+15x+4$ is the square of a binomial

Step-by-step explanation:

Step-by-step explanation:

We want to find such that:

two same numbers, , multiply to be and

add up to be 15.

We can solve the last equation by dividing both sides by 2:

So this means can be rewritten as:

Divide both sides by 4:

So .

Let's check:

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

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.