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Please expand the brackets in the following equation to get a quadratic equation. Then, please show using the quadratic formula that the solutions to the equation are x=3 and x=5. Here is the starting equation: (x-3)(x-5)=0

(X-3)(x-5)=0Use F.O.I.LFirst x multiplied by x gives x 2 outer x multiplied by -5 gives -5xinner x multiplied by -3 gives -3xlast -5x-3 gives +15combining we get x 2 -8x+15=0the quadratic equation ax 2 +bx+c...
JG
Answered by Jacob G. • Maths tutor
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Explain the difference between Humoral and Cellular adaptive immune response.

Firstly the adaptive immune response is the antigen specific response the body uses against free antigens or infected cells. It relies on the highly specialised lymphocytes, T-cells and B-cells, which are de...
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Answered by Tarek L. • Biology tutor
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What is the difference between "tu" and "vous"?

"tu" is a far more relaxed and friendly way of saying "you" in French. It can be used for friends and family. Don't use it with an adult or someone you don't know unless they have told yo...
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Answered by Georgina O. • French tutor
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Show that the funtion (x-3)(x^2+3x+1) has two stationary points and give the co-ordinates of these points

Stationary points are points where the gradient of a function is equal to 0. In this question the product rule can be used to find the gradient of the given function. The product rule is given by u'v+uv'= (u...
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Answered by Joe R. • Maths tutor
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Find the nature of the turning points of the graph given by the equation x^4 +(8/3)*x^3 -2x^2 -8x +177 (6 marks)

(1 mark) Differentiate equation in the question: 4x 3 +8x 2 -4x-8(1 mark) Equate this to zero: (x-1)(x+1)(x+2)=0(1 mark) Find turning points (roots of above equation): x=1,-1,-2(1 mark) Differentiate again: ...
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Answered by Elizabeth B. • Maths tutor
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