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f(x) = g(x), 2x+5=8x-7, 12=6x, 6x=12 therefore, x=2.

A leaky heart valve is called valve regurgitation and is caused by the valves not completely closing. Any valve in the heart can have a regurgitation whether that is the aortic, mitral, pulmonary or the t...

I found that the best way to prepare was by looking at past exam questions and attempting them under exam conditions - timed, in silence, and without notes. It can also be useful to look over worksheets t...

To factorise you need to look at common factors. And it needs to be put into the expression (x+/- y)(x+/- v)For X²-X-12, you need two numbers that times to make -12 and add to make -1-1X12, -12...

Pythagoras is a theory that works for right-angled triangles and allows us to work out the length of its sides.The theory is: x² = a² + b² (I will show this with a diagra...