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completing the square (x+5)² -25 -3 =0 (x+5)² -28 = 0 (x+5)² = 28 x= ±2√7 -5

Capillaries have walls only one endothelial cell thick, meaning their walls are very thin. This makes them well adapted for gas exchange, as substances only have to diffuse over a short distance. Addition...

The easiest way to approach this is by trying to find two numbers which add up to the x coefficient (the number attached before the x) and multiply to the constant (the number on its own). For example...x...

Plan of essay answer- Success= defined by popular support, media coverage and legal change. Intro- line of argument= was very successful in gaining support and media coverage, leading to legal change (ho...

Differentiation at A level is a method of working out the gradient of curves that aren't straight lines. If you have a function that is non-linear, which means any function that isn't in...