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Factorise y^2 - y - 12

Looking for a combination of numbers that would multiply to give (-12_ but add together to give (-1)e.g. -6, 2?....-2,6....-4,3 = yes!thus,(y-4)(y+3)

LM
Answered by Lavannya M. Maths tutor
3295 Views

5x-7 = 3x + 3, solve x

This is how the answer would be written in an exam!5x - 7 = 3x + 35x-3x = 3 + 72x = 10 x = 10/2x = 5

LM
Answered by Lavannya M. Maths tutor
4177 Views

Differentiate 5x^2+5y^2-6xy=13 to find dy/dx

This is an example of implicit differentiation, where the function in question involves two variables (x and y) and it is hard to rearrange to create a neat "y=..." equation. To differentiate th...

HS
Answered by Henry S. Maths tutor
5821 Views

Find the coordinates of the minimum or maximum of the function f(x) = 3x^2 -2x +9 and determine if it's a minimum or maximum.

To find the minimum or maximum we need to find a point on the function where its slope is zero. So, we differentiate f(x) and set it equal to zero: f'(x)=0, f'(x) = 6x -2 = 0, x=1/3 Substitute into f(x) t...

LB
Answered by Lilla B. Maths tutor
1634 Views

Find Dy/Dx of (x^2+4x)^3

So here we need to use the chain rule in order to differentiate the equation. To start you take the function inside the bracket x2+4x and differentiate it to Du/Dx= 2x + 4 this is known as u. d...

SO
Answered by Sam O. Maths tutor
3360 Views

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