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complete the square by rewriting x^2+6x-15 in the form (x+p)^2-q

To complete the square the first thing you must do is divide the coefficient (number in front) x by 2 to give (x+3)^2We must then expand out (x+3)^2 which can be done by writing it as (x+3)(x+3) then using t...
LA
Answered by Lamees A. • Maths tutor
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Translate: 'Abydeni legatos ad regem de condicionibus tradendae urbis miserunt.' (OCR H443/01 sample)

Step 1 - understand each word Abydeni - glossed as masculine plural, 2nd decl, and therefore must be nominative, subject of sentencelegatos - accusative plural of legatus -i m. = ambassador/commander. Ambass...
TB
Answered by Tom B. • Latin tutor
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Particle A mass 0.4kg and B 0.3kg. They move in opposite direction and collide. Before collision, A had speed 6m/s and B had 2m/s. After collision B had 3m/s and moved in opposite direction. Find speed of A after collision with direction and Impulse on B.

-> m1u1 + m2u2 = m1v1 + m2v22.4 - 0.6 = 0.4v1 + 0.90.9 = 0.4 v1v1 = 2.25m/s (direction unchanged)-> I = mv - mu= (0.3 x 3) - (0.3 x -2)= 1.5 Ns
SS
Answered by Samay S. • Maths tutor
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Draw the atomic structure of Magnesium

Atoms are made up of protons and neutrons in the nucleus, and electrons surrounding the nucleus in shells. Protons have a positive charge and electrons have a negative charge, so for an atom to have a neutra...
IA
Answered by Isabel A. • Chemistry tutor
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Explain why transition metal complexes are coloured?

In a complex transition metal ion, the electric field produced by the lone pairs on ligands when they interact with the central metal ion causes the d orbitals to split into two sub levels. As the dx 2 -y 2 ...
Answered by • Chemistry tutor
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