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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
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Answered by Jawad C. • Maths tutor
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(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
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Answered by Arjun C. • Maths tutor
4291 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, ...
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Answered by Jacob R. • Maths tutor
5128 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...
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Answered by Ben W. • Maths tutor
3521 Views

Sam takes out a £720 loan. Sam will have to pay back the £720 plus an interest rate of 15%. He will have to pay this back in 12 equal monthly instalments. How much must Sam pay monthly?

First, you must find out the total amount to pay back, this amount will be £720 + 15% of £720. To find 15% of £720, we first calculate 720/100 to find 1% and the multiply by 15: 720/100 = 7.2 *15 = 108. Now ...
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Answered by Samuel N. • Maths tutor
4652 Views