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Expand and simplify (n + 2)^3 − n^3.

Expand and simplify ( n + 2) 3 − n 3 . Write out the brackets in full:( n + 2)( n + 2)( n + 2) − n 3 Use F.O.I.L. (First, Outer, Inner, Last) on first two sets of brackets:( n 2 + 2 n + 2 n + 4)( n + 2) - n ...
DC
Answered by Dominic C. • Maths tutor
5699 Views

(x+3)(x+2)

Inner inner + outer outer + inner outer + outer innerCheck if anything could be added together to simplify the terms Result = x 2 +5x+6
AO
Answered by Abdelrahman O. • Maths tutor
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Solve the following pair of simultaneous equations: 2y - x = 3, y + 4x = 4

There are 2 main methods for solving simultaneous equations: 1) by substitution, and 2) by elimination . Have a look at how each method works and pick the one that's best for you! In order to make my explana...
SP
Answered by Saranya P. • Maths tutor
4134 Views

Complete the square for the equation x^2 - 12x + 8 = 0

To complete the square, we will need to put the equation into the form (x - a) 2 - b + 8 = 0 , where a is half of the coefficient of x (12 in this case) and b is the value we need to subtract in order for th...
MJ
Answered by Mark J. • Maths tutor
4525 Views

Find dy/dx when y = 5x^6 + 4x*sin(x^2)

Looking at the first element of the equation 5x 6 , we can simply multiply 6 by 5 to give 30 and subtract 1 from the power of x. So d/dx[5x 6 ] = 30x 5 . The next element of the equation is 4x sin(x 2 ), whe...
MJ
Answered by Mark J. • Maths tutor
3469 Views