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I’ve been taught two methods for solving pairs of simultaneous equations. When should I use which?

You’ve been taught elimination and substitution. (You should also be able to solve simultaneous equations graphically.) In the elimination method, you multiply up the equations to make them have a term that ...
RM
Answered by Rosemary M. • Maths tutor
10439 Views

Simplify Fully 4(2x+1)-2(x-5) .

First concentrate on expanding out the first set of brackets: 4(2x+1).Multiply the contents of the bracket by 4, giving 8x+4.Next concentrate on expanding out the second set of brackets not forgetting the mi...
SS
Answered by Sanju S. • Maths tutor
5360 Views

Expanding Brackets: (x+3)(x+4)

Expanding Brackets: 1) FOIL (first pair, outer pair, inner pair, last pair) 2) (x+3)(x+4)=x^2+4x+3x+12 3) exemplifying why to do FOIL method by subbing in a value for x (e.g. x=3) 4) (3+3)(3+4)=6x7=42 5) usi...
RP
Answered by Ruben P. • Maths tutor
3763 Views

Simplify fully 3(3 – x) – 2(x – 4)

3(3 – x) – 2(x – 4)Open out the brackets--> 9 - 3x - 2x + 8Simplify--> -5x +17
LC
Answered by Laura C. • Maths tutor
3812 Views

What does differentiation mean and represent? (A-Level students)

Simply put, differentiation allows you do find the gradient of a line, whether it is linear or a curve. When you first learn about the equation of a straight line, commonly displayed in the form y=mx+c, wher...
ST
Answered by Sam T. • Maths tutor
3703 Views