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For the first part, use the 'complete the square method', which gives (x-7/2)² -49/4+2, simplified to (x-7/2)²-41/4. To find the answer for the second part, set x=7/2 so that the bra...

This is a good example of where simplification can make an otherwise tricky question a lot easier. It is easy to get confused trying to work out different isotopes and the extra products of the decays, bu...

We can classify these words in two categories, verbs for "est" and "es" which are the conjugaison of the verbe "être" = "be". "est" is use when the subjec...

The average revenue curve for a perfectly competitive firm is horizontal due to the fact that it faces perfectly elastic demand at the market determined price. This is because there is a significant amoun...

We know thst the binomial expansion formula is (1+x)ⁿ = 1+nx +(n)(n-1)(x²)/2! ...etc

Thus we want to rearrange the expression we are given into the form (1+x)ⁿ so t...