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Solve x2 +2x – 4 = 0, leaving your answer in simplest surd form (4 marks, non calculator question)

'Simplest surd form' is a clue that quadratic factorising will not work for this question, so we must instead use the quadratic formula. It is always a good idea to quote this as marks are often available fo...
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Answered by Fiona O. • Maths tutor
16467 Views

Explain briefly how instantaneous dipole - induced dipole bonds form.

(ASSISTED WITH DIAGRAMS) The electrons of a molecule are constantly moving around it in charge clouds, meaning that at any one point in time, the molecule's electrons could be more likely on one side than th...
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Answered by Bethany R. • Chemistry tutor
8264 Views

Solve these simultaneous equations: 2x + 5y = 37 and y = 11 - 2x

Simultaneous equation questions look very intimidating because not only are there 2 equations to solve but there is 2 variables in each! To start with, we're going to make the equations look less confusing b...
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Answered by Bethany R. • Maths tutor
6420 Views

Find the roots of x^2+5x+4=0

(x+4)(x+1)=0 x=-1 x=-4
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Answered by Christian D. • Maths tutor
3716 Views

What is the difference between binary form and rounded binary form?

Binary form and rounded binary form are mostly the same in that they both have two related themes, one in each section, A and B, modulate to the dominant at the end of the A section, and back to the tonic at...
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Answered by Helena M. • Music tutor
21917 Views