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y = 6x^2 + 8x + 2. Find dy/dx

y = 6x 2 + 8x + 2 To find the first derivative of this equation, we must multiply the powers of x with the coefficient. Therefore, we do 2 times 6 (2 is the power and 6 is the coefficient) for the first term...
RD
Answered by Raj D. • Maths tutor
9598 Views

How do I know whether to add or minus in Pythagoras's theorem?

Firstly it has to be a right angled trinagle. Even if it is an irregukar shape, draw a line in to make it a right angled triangle. When you have your right angled triangle remember it is ALWAYS + if it is th...
NM
Answered by Nehemie M. • Maths tutor
42538 Views

Solve: 3(x - 2) = 21

First you look at BIDMAS, which determines the order in which functions are completed, [Brackets, Indices, Division, Multiplication, Addition, Subtraction], which says we deal with the brackets first, so we ...
MV
Answered by Mia V. • Maths tutor
21609 Views

Expand and simplify (3x+2) (x-5)

We expand this term by term. To make sure we expand every term, I use the beak method. To do this, draw 2 curves over the equation from the 3x to the x , and then a second curve from the x to the + 2 . Then ...
DS
Answered by Dominic S. • Maths tutor
20239 Views

What is 3!/5! written in standard form?

We can write out 3! (three factorial) as 3x2x1, and we can write out 5! as 5x4x3x2x1. This means that, since 3x2x1 is on the top and the bottom of the fraction, it cancels out. This leaves us with 1 on top, ...
DA
Answered by David A. • Maths tutor
21789 Views