Parsing algebraic expressions is always a pain. If you need to compute, say, 2+4*2, the answer should be the same as (2 + (4 *2)), not ((2 + 4) * 2) — in other words, the right answer is 10 ...

Save guides, add subjects and pick up where you left off with your BBC account. In algebra, letters are used to stand for values that can change (variables) or for values that aren’t known ...

Save guides, add subjects and pick up where you left off with your BBC account. In algebra, letters are used to stand for values that can change (variables) or for values that are not known ...