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Expand and simplify: (2x+3)(x-8)

For this kind of question, the FOIL method can be used. You start by multiplying the FIRST aspects of both brackets, in this case giving 2x². Then you do the same with the OUTERS, the last elements in each b...
GC
Answered by Georgia C. • Maths tutor
17540 Views

Solve the Simultaneous equations '2x-3y=24' and '6x+2y=-5'

To solve you must make sure there are the same number of either x's or y's in both equations. We will call '2x-3y=24' equation 1, and '6x+2y=-5' equation 2. If you multiply equation 1 by 3 then you get '6x-9...
ES
Answered by Elena S. • Maths tutor
7780 Views

Factorise x^2-7x+12

First write down all the factor pairs of 12 (1,12) (-1,-12) (3,4) (-3,-4) (6,2) (-6,-2). From these factors, find a pair that, when added together, is equal to -7. In this case the correct pair would be -3 a...
HD
Answered by Harry D. • Maths tutor
10506 Views

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
8840 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
12615 Views