Top answers

How do you solve an equation by completing the square?

Firstly, you can only complete the square on quadratic functions (functions in the form Ax 2 +Bx+C) If A=1, C onsider B, the coefficient of x. Substitute it into ( x + (B/2) ) 2 . We know if we multiply this...
EJ
Answered by Emma J. • Maths tutor
5736 Views

What is compound interest and how do I calculate it?

Compound interest means, for example, the money you have put into a bank, earns interest each year, but you earn interest upon the interest that was already added last year i.e. you earn interest on the new ...
RF
Answered by Rocio F. • Maths tutor
12172 Views

If y = 2^x, find dy/dx

Q: If y = 2^x, find dy/dx. ANSWER: 1) Take Logs of both sides of our equation y = 2^x So we get: log(y)=log(2^x) 2) Apply relevant log rule to rhs: Log rule: log(a^b) = b . log(a) [nb: the dot between b and ...
BM
Answered by Bav M. • Maths tutor
69825 Views

How do you find the mean of 5 values?

As a general rule of thumb, to find the mean of a given set of numbers: add up all the numbers youve been given and divide by the number of values you have. e.g. Find the mean of these values: 5, 10, 8, 9, 2...
OP
Answered by Olivia P. • Maths tutor
32866 Views

Polynomial long division, how do I do it?

Polynomial long division is how to divide long functions f(x), called the dividend, by another function g(x), called the divisor. Which could lead to having a remainder, if it doesn't divide perfectly. Lucki...
GP
Answered by Giulio P. • Maths tutor
7762 Views