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As why is in the for y=uv where u and v are funtions of x, dy/dx=u'v+v'u (where ' implies the derivative) u=(3x+1)², v=cos(3x) therefore using the chain rule u'=23(3x+1)=18x+6 and v'=-...

There are two strands to the policy. Firstly, they want local GP surgeries to open on a Saturday and Sunday. They do not expect every surgery to be open and instead have urged GPs to work together with ot...

1) Leaked governmental plans highlighted the lack of funding and detailed plans for the seven day NHS, causing more doctors to raise concerns. 2) GPs have questioned whether opening surgeries for routine ...

x² - 10x + 33 ≡ (x - a)² + b Work out the value of a and b. Our aim here is to write the expression on the left in the same form as the one on the...

First you need to remove the fractions from each side,

take the equation: (x+1)/(x+3) = (2x-1)/(3x-1)

now multiply by x+3 to give x+1 = (2x-1)(x+3)/(3x-1)

now multiply by (3x-1) to gi...