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How should I analyse a primary source?

When approaching primary source questions it is worth remembering that the examiner needs to see you weigh up the source’s evidence in the light of your own knowledge. This is easy to do if you apply the ‘ C...
AH
Answered by Anne H. • History tutor
4910 Views

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

x 2 +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 Simplify the expression (x+3) 2 =4 Move 4 to the other side of the e...
BS
Answered by Ben S. • Maths tutor
10134 Views

Expand 4e(e + 2)

4e^2 + 8e
Answered by • Maths tutor
18373 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(x 2 +5x +6) = 0 The inside of the bracket is now a sta...
HW
Answered by Holly W. • Maths tutor
5432 Views

Draw a carbon dioxide molecule and describe the bonding?

Covalent bond (sharing a pair of elections between two non metal atoms)O = C = O
KM
Answered by Krishna M. • Chemistry tutor
3095 Views