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A parabola shape with x intercepts at x = -3 and x = 7 and the y intercept at y = -21

Factorise to get (x+3)(x-7)=0 
So you can see that x = -3 or x =7 

first of all the equation needs to be written in the form (ax+b)(x+c) 

because 2 can only be made by multiplying 2 and 1 we know that a=2 so (2x+b)(x+c)

-6 can be made by multiplying 2 and -...

If P is directly proportional to Q then that means if Q increases P will also increase. If Q decreases P will also decrease. Two values that are directly proportional to each other are related to each oth...

This is a sequence in the form 1 + c + c² + … cⁿ

1 + c + c² + … cⁿ  * (1 - c) = 1 – cⁿ⁺¹

So we can rewrite the sequence as

1 – c...