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How do you check if a graph ever touches the x-axis?

At the x-axis, y is always zero at any point. If you want to fnd out whether or not a graph reaches the x-axis, then substitute y=0 into the equation and find the value of x. If it solves, then we know it do...
JC
Answered by Jawad C. • Maths tutor
19580 Views

How do you factorise x^2 -4 = 0?

x 2 -4=0 becomes (x+2)(x-2)=0 Either one of the two brackets has the value of 0. If the first bracket is zero, then x+2=0, therefore x=-2 If the second bracket is zero, then x-2=0, therefore x=2
JC
Answered by Jawad C. • Maths tutor
4069 Views

(6x+4)/(2x- 2) + 3 = 4 solve for x

divide fraction by 2 3x+2 / x-1 + 3 = 4 multiply by x-1 3x + 2 + 3x - 3 = 4x - 4 6x -1 = 4x -4 2x = -3 x= -3/2
AC
Answered by Arjun C. • Maths tutor
4203 Views

How do you find the points of intersection of two curves?

This problem is a graphical representation of finding the solutions to a pair of simultaneous equations. In this example we will use the curves y=2x 2 , and y=x 2 +1. This is a very straightforward example, ...
JR
Answered by Jacob R. • Maths tutor
5033 Views

I'm struggling with quadratic equations

Quadratic equations can be tricky, to begin with, but once you get the hang of them they can become one of the best maths tools on offer to you. All quadratic equations with real roots can be solved with the...
BW
Answered by Ben W. • Maths tutor
3438 Views