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First of all we must factorise this:x² + 6x + 8 = 0(x+4)(x+2) = 0Now we make each bracket = 0 and solve for x.x+4 = 0 x+2 = 0x = -4 x = -2

The question tells us that the area of the circle is 49cm², therefore we are able to form the equation πr²=49 (where r = radius of the circle). We can now work out the radius of the ...

To make crystals of copper chloride from copper carbonate andd dilute HCl, you will firstly need to add an excess of copper carbonate to the dilute HCl (keep adding until no more reacts). Next, take the s...

We need to use the equation : Moles=Mass/MrSubstitute in value : moles= 36/12Therefore number of moles in 36 grams of carbon is 3.

Homeostasis is the physiological process of maintaining a condition such as temperature or chemicals in a normal range despite changes that occur everyday in the body. Usually, this is regulated by hormon...