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Solve x^2+6x+1=0 by completing the square

x2+6x+5=0 First of all half the x coefficient and write (x+6/2)2 the take away the (6/2)2 and add on the 5
(x+3)2-9+5=0
(x+3)2-4=0 ...

BS
Answered by Ben S. • Maths tutor
7832 Views

Find the equation of the tangent to curve y=5x^2-2x+3 at the point x=0

y=5x2-2x+3 Differentiate to find the equation of the gradient of the curve
dy/dx=10x-2 Substitute x=0 to find the gradient at the point x=0
dy/dx=-2

y=50^2-2

Answered by • Maths tutor
5250 Views

Explain the analogy of the divided line as an exemplary case of Plato’s epistemology

This question from an IB philosophy exam gives an opportunity to discuss Plato’s epistemology in books V–VII his Republic with a focus in one of its classical analogies: the divided line. Plato s...

CH
2380 Views

Expand 4e(e + 2)

4e^2 + 8e

Answered by • Maths tutor
16711 Views

Factorise and solve the quadratic : 3x^2 + 15x +18 = 0

First we look to see if there is a common factor in the equation. In this case there is a common factor of 3, therefore we can take 3 out as a factor. 3(x2 +5x +6) = 0
The inside of the br...

HW
Answered by Holly W. • Maths tutor
4083 Views

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