Standard high school algebra questions. Using symbols for unknown quantities, expressions involving such symbols, factors, solving equations, inequalties, indices, binomial products, solving quadratic equations, simultaneous equations

## Project activity

#### Ben Brawn on Reversed subtraction 4 months, 4 weeks ago

Thanks Joshua. I have just removed the extra options so there is only, equivalent and not equivalent.

#### Joshua Capel on Reversed subtraction 5 months, 2 weeks ago

When the fractions are not equivalent in part (b) they are of the form z=(a-b)/(c-d) and z=(b-a)/(d+c) respectively.

In this case the answer requires the selection of the option

"not equivalent! One is the negative of the other.", but this is not true.I think the option

"not equivalent! One is the negative of the other."should be incorrect in both cases (but this will change the number of correct options between the two types of question).

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