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-9=x^2+6x

0=x^2+6x+9

0=(x+3)(x+3)

when y=-9 x=3

dy/dx=2x+6

dy/dx=2(3)+6=12

• Not attempting tasks perceived as more difficult

• Low self-esteem

• Believe that their participation in the task will have little/no effect (so what's the point?...

Antibodies are  rapidly produced by white blood cells in response to the vaccination, and these antibodies kill the pathogens. Memory cells are produced in order to combat further infection more rapidly v...

Initially, when you drop an object the only force acting on it is gravity. This accelerates the object towards the ground. As the objects speed increases so does the force of air resitance acting on the o...

There are three ingredients you need when writing and structuring any English lit essay:

Introduction 

PEE

Conclusion

In every essay you need an introduction to your essay, usu...