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How do I solve quadratic equation by completing the square : X^2 - 4X = 5

We have X 2 - 4X = 5, write the expression on the left side as X 2 - 2•2X = 5. Then we would need extra term 4 to complete the square, so adding 4 on the both sides gives us, X 2 - 2•2X + 4 = 5 +4. Simplify ...
RK
Answered by Rabin K. • Maths tutor
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How should I approach the critical essay? (Higher)

The key to this portion of the paper is to know your studied texts in depth. This is not to say that you should be able to recite 200 different lines from Anthony and Cleopatra. It is a case of understanding...
TD
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What is the difference between conservation and preservation regarding species

Although they both promote sustainability: Conservation is the human involvement in attempts to protect wildlife. Usually with endangered species where they can be tracked and looked after with human help, t...
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Answered by Aadil C. • Biology tutor
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Integrate cos(4x)+16x^3 with respect to x

This is a simple integration, integrating each individual term with respect to x.For the cos(4x), you should use 'integration by substitution' as it is a function of a function.cos(4x) = cos(u) and u = 4x wh...
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Answered by Aadil C. • Maths tutor
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When calculating a question with a double integral question between two different ranges which range relates to which integration variable.

When doing double integration with two arbitrary variables, for example 'x' and 'y' look at the Integration on the inside and integrate the function between the given range. For example if the integrand is t...
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Answered by Piranavan V. • Maths tutor
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