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x2+8x +15 = 0(x+4)2-16 +15=0(x+4)2-1=0(x+4)= (+/-)1x = -3 or -5
The easiest way to do this is to first work out the area of the whole circle. To work out the area of a circle, the equation is area = πr2 , w...
To complete this task we use a method called "Completing the square. For this we use a formula (a+b)^2=a^2+2ab+b^2.Now we see that in the example we have a term x^2 so we put x^2=a^2 so we can ...
P=(3a+5)/(4-a)First of all we need Get rid of the denominator, we do this by multiplying both sides by (4-a)This leaves P(4-a)=3a+5 (as any term multiplied by the denominator leaves only the numerator)Th...
t = (v - u) / a
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