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Solve the quadratic equation x^2 + 4x +1 = 0 by completing the square.

Completing the square means to put our equation into a slightly different form which looks like this, where a and b are real numbers: (x+a) 2 + b = 0 From here, we can rearrange the equation and directly sol...
AP
Answered by Andrew P. • Maths tutor
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How do I analyse a poem with close analysis?

This is a very important skill - for GCSE, above and below! The first stage is to read the poem at least twice, first just going over it, and the second time underlining or highlighting things that you find ...
AA
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Essere or Avere in the simple past?

The simple past is formed with an auxiliary verb plus the past participle. The two auxiliary verbs are essere and avere . When to use avere Avere is the most common auxiliary verb. It is used with transative...
AM
Answered by Alex M. • Italian tutor
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What are the stages of mitosis?

Mitosis consists of four basic phases. 1. Prophase 2. Metaphase 3. Anaphase 4. Telophase It is a common mistake to believe that interphase is part of mitosis. In fact, interphase is just a preparation stage ...
JJ
Answered by Josh J. • Biology tutor
6047 Views

What bonds are present in each type of structure of a protein?

PRIMARY PROTEIN STRUCTURE This is the sequence of amino acids in a polypeptide chain. These are bonded together by strong covalent bonds . SECONDARY PROTEIN STRUCTURE The secondary structure is the shape tha...
JJ
Answered by Josh J. • Biology tutor
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