Top answers

expand (2x+4)(x+2)

For this question you can use a method called the foil method. The F stands for first therefore you times the 2 variables that are first in each bracket. 2x times x which gives you 2x^2. The O stands for out...
AF
Answered by Aiyshah F. • Maths tutor
6088 Views

Integrate the function 1/sqrt(9-x^2) with respect to x

Hint: Use the substitution x = 3sin(u)Method: substitute u into the function then times it all by dx/du. Simplify and integrate with respect to u to get u. Then resubstitute x back into the equation to get:A...
LG
Answered by Luke G. • Maths tutor
4705 Views

Given two coordinate points (a1,b1) and (a2,b2), how do I find the equation of the straight line between them?

Firstly, remember that we can write such a line in the form y = mx + c, where x and y are our two axes, m is the gradient of the line, and c is the y-axis intersection point. Given this general formula, we n...
LH
Answered by Lewis H. • Maths tutor
8534 Views

Question 6 from Aqa 2017 June paper for C4, the vector question

Solution for a) and b) via the link: https://imgur.com/a/ESjeeLJSolution for c) and d) via the link: https://imgur.com/a/1ZmbQdc
TD
Answered by Tutor131357 D. • Maths tutor
3526 Views

What is a limit?

In mathematics, the limit of a function is the value, towards which a function tends, as the independent variable of the given function gets closer and closer to some number. In other words, take our functio...
MS
Answered by Martin S. • Maths tutor
4254 Views