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How do you solve simultaneous equations?

There are two main methods for solving simultaneous equations. The first method is the elimination method. This method uses addition or subtraction of the two equations with equal amounts of 'x' or 'y' in or...
WS
Answered by Wei Shi H. • Maths tutor
5096 Views

(x-4)^3

=(x-4) 2 (x-4)=(x 2 -8x+16)(x-4)=x 3 -4x 2 -8x 2 +32x+16x-64= x 3 -12x 2 +48x-64
PB
Answered by Pavel B. • Maths tutor
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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: - y is the y-coordinate of any point on the line - x...
JB
Answered by Jessica B. • Maths tutor
3487 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 will...
HR
Answered by Henry R. • Maths tutor
4061 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 50 2 / 4 1/2 Then work out the values of the 50 2 and 4 1/2 50 2 = 25004 1/2 =2Put these b...
LB
Answered by Louise B. • Maths tutor
4869 Views