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(x-4)^3

=(x-4)²(x-4)=(x²-8x+16)(x-4)=x³-4x²-8x²+32x+16x-64= x³-12x²+48x-64

3222 Views

How do I find out the equation of a line?

First of all, we must remember the formula for the equation of a line.

This is y=mx+c.

It is important to understand what each part of the equation means:

Answered by Jessica B. • Maths tutor

2888 Views

Find the first derivative of f(x) = tan(x).

First, use the trigonometric identity tan(x) = sin(x) / cos(x) to rewrite the function. It should now be very apparent that f(x) is now actually a ratio of two functions, and therefore the quotient rule w...

Answered by Henry R. • Maths tutor

3260 Views

Use approximations to 1 significant figure to estimate the value of 0.101 x (51.2)^2 / (3.96)^1/2

Firstly simplify the equation down so all the elements are approximated to 1 significant figure, this gives us:0.1 x 50² / 4^1/2Then work out the values of the 50² and 4

Answered by Louise B. • Maths tutor

4191 Views

How do you expand out and simply brackets, like the following: (x-3)(x+4)?

So when you want to expand out 2 brackets, there's a really simple method, known as FOIL. FOIL stands for "First, Outer, Inner, & Last". So if we look at the two brackets you gave as an exam...

Answered by Chang K. • Maths tutor

3239 Views