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Solve 3x^2 - 5 = 43

First, we want all the terms with X on one side, so let's +5 to both sides.3x 2 = 48Let's simplify, so we get x 2 on its own.48÷ 3=16x 2 = 16Now, we need x 'unsquared', so we will square root it. √16=4
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Answered by Naomi M. • Maths tutor
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Solve 2x^2 = 162

First simplify the equation! This means making the side with your Xs on easier to read.162÷2=81Now we have x 2 = 81 √81=9(Remember 9x9=81.)
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Answered by Naomi M. • Maths tutor
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Describe the requirements, process and applications for Polymerase Chain Reaction (PCR)

Requirements· Original DNA sample (to be amplified)· dNTPS (4 DNA nucleotide bases)· Thermal cycler (reaction vessel)· Buffer solution (to maintain stable pH)· Taq Polymerase· DNA primers (forward and revers...
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Answered by Verity L. • Biology tutor
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explain the term 'global commons'

The term 'global commons' refers to resources that are shared and accessible by all, with no single governing country or power. The four notable global commons include the high seas, the atmosphere, outer-sp...
Answered by • Geography tutor
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Explain how oxygen is loaded, transported and unloaded in red blood cells

Haemoglobin is a molecule in red blood cells with a high affinity for oxygen. It consists of 4 haem groups, each of which associate with one oxygen molecule at high pO 2 , typically in the lungs. Haemoglobin...
Answered by • Biology tutor
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