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express x^2-4x+9 in the form (x-q)^2+y

divide the coefficient of the x term by 2-4/2=-2this is the value of the term, q.to find the term, y, simply square the value of q, and subtract it from the number term, which is in this case, 9(-2)^2=4. y=9...
HC
Answered by Hugo C. • Maths tutor
6375 Views

4. The curve C has equation 4x^2 – y3 – 4xy + 2y = 0. P has coordinates (–2, 4) lies on C. (a) Find the exact value of d d y x at the point P. (6) The normal to C at P meets the y-axis at the point A. (b) Find the y coordinate of A

Differentiate Implicitly with respect to x- ( do it term by term, terms with only x's diff normally, terms containing a Y should be differentiated following the standard pattern but then multiplied by dy/dx ...
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Answered by Hamish P. • Maths tutor
6706 Views

A reaction, A + B -> C, is considered second order with respect to A and first order with respect to B. What is the effect of simultaneously doubling the concentration of A and B on the rate of reaction?

"second order with respect to A" tells us that doubling the concentration of A will cause the reaction rate to increase by a factor of 4."first order with respect to B" then tells us that...
HJ
Answered by HENRY J. • Chemistry tutor
2905 Views

Could you tell me what would be the six basic emotions of a person?

Happiness, sadness, fear, anger, surprise and disgust.
MP
Answered by Madalina P. • Drama tutor
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What is Utilitarianism?

Utilitarianism is an consequntalist ethical theory that is concerned with providing the greatest good/happiness for the greatest number of people.
JL
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