Top answers

How would you solve a quadratic equation (e.g. x^2-8x+15=0)?

There are two ways to solve the equation. One is to simply factorise it and the other is to use the formula provided in the formula booklet. The second method is probably easier when there isn't a nice easy ...
JG
Answered by Jane G. • Maths tutor
3412 Views

What is the first derivative of y=5z(1+2z2)? Is this a minimum, maximum or turning point?

You should not be put off by the algebraic letters used, substituting x's for z's is absolutely fine. For the first part of the question, since the equation involves the product of two terms, there are two w...
TR
Answered by Tom R. • Maths tutor
4454 Views

integrate function (x^4+3x)/(x^2) with respect to x

split the integral into (x^4)/(x^2) and (3x)/(x^2) which becomes x^2 and 3*(1/x). These can now be integrated separately and added together after the integration. first integral: raise the power form 2 to 3,...
CS
Answered by Calum S. • Maths tutor
4184 Views

Estimate the answer to: (4.28 x sqrt(99))/7.83

4.28 rounds down to 4; sqrt(99) is approximately 10; 7.83 rounds up to 8 So an appropriate estimate would be: (4x10)/8 = 40/8 = 5
AT
Answered by Amy T. • Maths tutor
3342 Views

-8x + 7 > 5x + 2

-13 x + 7 > 2 -13 x > -5 x < 5/13 Remember multiply or divide a number by a negative number, you switch the inequality sign
HK
Answered by Hyerim K. • Maths tutor
3470 Views