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Solve the quadratic equation (x^2)-x-12=0 (easy), (x^2)-9=0 (special case), (x^2)+5x-13=0 (quadratic formula)

For each of the above the methodology is fairly similar, first try and do it just by looking at it then try the quadratic formula if that doesn't work. At GCSE level I don't think there's any need to worry a...
JE
Answered by Jack E. • Maths tutor
3553 Views

Maths A Level: "Sketch the curve of the function f(x) = 2x^3 - 2x - 12 and show that the equation f(x)=0 has one root; calculate the root."

Consider the curve y = 2x^3 - 2x - 12.1) y-intercept. When x=0, y= -12 3) when x tends to infinity...y tends to infinity and when x tends to negative infinity...y tends to negative infinity 4) stationary poi...
JI
Answered by Joseph I. • Maths tutor
3405 Views

How does Insulin work within the body?

Insulin is a hormone that is produced by the pancreas and is released into the bloodstream to control the level of glucose in the blood. When the blood glucose concentration is too high, the pancreas secrete...
SP
Answered by Sonam P. • Biology tutor
4001 Views

Describe the process of Translation?

The ribosome will bind to the mRNA at a specific binding site. The ribosome will then start to match tRNA anticodon sequences to the mRNA codon sequence. Each time a new tRNA comes into the ribosome, the ami...
TP
Answered by Tanya P. • Biology tutor
3032 Views

A ball of mass 500g is dropped from rest 2m above the ground. When it reaches the ground it is travelling at 5m/s. How much energy has been dissipated?

Initial energy (Gravitational Potential): E = mgh = 0.5 x 9.81 x 2 = 9.81J Final energy (Kinetic): E = mv 2 /2 = (0.5 x 5 2 )/2 = 6.25J Energy lost = 9.81 - 6.25 = 3.56J
GB
Answered by Georgina B. • Physics tutor
2576 Views