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Write x^2 - 6x +7 in the form (x+a)^2 +b

Follow standard procedure that can be taught on a whiteboard. In general:ax^2 + bx + c = (x+b/2)^2 - (b/2)^2 + csox^2 - 6x + 7 = (x-3)^2 - (9) + 7= (x-3)^2 - 2
JC
Answered by James C. • Maths tutor
5356 Views

To what extent were the Atlantic Revolutions inspired by Enlightenment political ideas?

Equal rights for man were key political Enlightenment ideas that were pivotal to the American and Haitian Revolutions. These ideas were underpinned in Rousseau’s ‘Social Contract’ [1] (Appendix, Source 1); R...
BS
Answered by Blayne S. • History tutor
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Define an obtuse angle.

An angle between 90 degrees and 180 degrees. NB- a reflex angle is an angle between 180 degrees and 360 degrees.
RM
Answered by Roshini M. • Maths tutor
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Sketch the curve with the equation y=x^2 +4x+4, labelling the points where it crosses or touches the axes.

The curve is a quadratic equation because it has a x^2 - as it is positive it will be a u shaped parabola. The equation can be factorised by thinking of two numbers which add to make 4 (the b value) and mult...
SS
Answered by Sophia S. • Maths tutor
4351 Views

How do cholinergic synapses communicate with each other (5)

Acetycholine released from presynaptic neurone2) Acetylcholine diffuses down its concentration gradient and attaches to receptors on postsynaptic neurones3) This causes sodium channels to open on the post sy...
MV
Answered by Mohit V. • Biology tutor
2811 Views