Christian Lawson-Perfect

Christian Lawson-Perfect on Solving linear simultaneous equations by elimination 8 years, 5 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Solving linear simultaneous equations by elimination 8 years, 5 months ago

Saved a checkpoint:

Set up the randomisation again so that all numbers are integers.

In part a, the $x$ coefficient of the second equation is a multiple of the coefficient in the first equation.

In part b, the LCMs of the $x$ and $y$ coefficients are strictly larger than any of the coefficients.

Christian Lawson-Perfect on Expand brackets and collect like terms 8 years, 5 months ago

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Christian Lawson-Perfect on Expand brackets and collect like terms 8 years, 5 months ago

Saved a checkpoint:

I've set expected variable names for the parts with more than one variable.

Christian Lawson-Perfect on Factorising Quadratic Equations with $x^2$ Coefficients Greater than 1 8 years, 5 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Factorising Quadratic Equations with $x^2$ Coefficients Greater than 1 8 years, 5 months ago

Saved a checkpoint:

Removed a lot of rubbish which must have come from a previous question, and renamed the variables so they make sense.

It's important that the coefficients of $x$ in the two factors aren't the same - otherwise, the order of the factorisation would be ambiguous.

Christian Lawson-Perfect on Transformation - Enlargement 8 years, 5 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Transformation - Enlargement 8 years, 5 months ago

Saved a checkpoint:

Not massively happy with this - the centre of enlargement is always $(0,0)$ and the scale factor is always $\pm 2$.

The diagrams aren't very precisely drawn either.

I've reworded the advice so it actually gives the answers.

Christian Lawson-Perfect on Applied y-intercepts: Investing in boats 8 years, 5 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect on Applied y-intercepts: Investing in boats 8 years, 5 months ago

Saved a checkpoint:

I've reworded a few things, replace the list of (all-male) famous people with the random names extension, and put the "identify the constant term" part above the "write down the constant term" part.