Top answers

Solve x² + x -12

So to begin we need factors of 12. 12 and 1, 3 and 4. Then we need to think of a way of adding or subtracting to give -1. So we can have 4 and -3. which gives (x+4)(x-3). So x= -4 or x=3
PB
Answered by Param B. • Maths tutor
8922 Views

How to solve the simultaneous equations of 3x + 2y = 9 and x-y = 3

First off we can refer to the equations as equation 1 and equation 2. In order to solve the equations we must find a way to combine them that elimates one of the variables ( X or y) so that the other can be ...
AR
Answered by Alice R. • Maths tutor
12752 Views

Find the roots of the equation y=x^2-8x+5 by completing the square.

Firstly, we need to look at completing the square. This is done by looking at the x^2-8x section of the equation. We need to find a way of converting it to the format of (x-a)^2. If you remember, when multip...
AG
Answered by Aaron G. • Maths tutor
5086 Views

Solve the equation " 2sec^2(x) = 5tanx " for 0 < x < π

Firstly, we must recognise that the equation contains two different trigonometric functions (sec() and tan()) and therefore we must rewrite one of these functions in terms of the other. Therefore we will nee...
JB
Answered by Joel B. • Maths tutor
16039 Views

Solve the simultaneous equations; 5x + 2y = 11, 4x – 3y = 18

Here you have 2 equations and you need to find the value of x and of y. First we are going to find the value of x. We do this by eliminating the y factor by multiplying and adding the equations. If we multip...
AC
Answered by Alice C. • Maths tutor
20897 Views