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How do you factorise a quadratic expression using the formula

To factorise an expression of the formax 2 +bx+c We use the formulaX=(-b+/- (b^2-4ac)^(1/2))/2aExample:Factorise 3X 2 +2X+-1So here a=3 b=2 c=-1From the formula we get X=1/3 and X=-1And so our factorisation ...
KS
Answered by Kaitrin S. • Maths tutor
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Explain how different landforms may be created by the transport and deposition of sediment along the coast

Long Shore Drift is responsible for the creation of the majority of coastal sedimentary landforms. Eroded material, ranging in size from fine sand to larger pebbles and cobbles, are transported in three ways...
HW
Answered by Harry W. • Geography tutor
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Discuss how the cardiovascular system adapts to long term aerobic exercise.

In response to aerobic exercise (longer durations at a lower intensity using oxygen), the cardiovascular (CV) system adapts over time to become more efficient. Adaptions include cardiac hypotrophy where the ...
AJ
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Calculate y=4x-6 when x=3

Firstly we have an equation y=4x-6. We are given that x=3 and we want to find y. What we must do is substitute x=3 into the equation to get y: y=4(3)-6 =6
SU
Answered by Sinan U. • Maths tutor
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Expand and simplify (3x^2 + 2)(2x + 5) – 6x(x^2 – 3)

First, multiply out 6x(x^2 - 3) so that it becomes – 6x^2 – 18xThen, multiply (3x^2 + 2) and (2x + 5) so that it becomes 6x^3 + 15x^2 + 4x + 10Add the two results above: 6x^3 + 15x^2 + 4x + 10 – 6x^3 – 18x S...
AB
Answered by Ancel B. • Maths tutor
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