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Factorise x^2+12x+7

(x+4)(x+3) From the question you need to write out all the multiples of the coefficient of x, in this case: 1 and 12, 2 and 6, 3 and 4. The numbers in the brackets have to also add up to the number at the en...
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Answered by Veronica A. Maths tutor
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Integrate ((x^3)*lnx)dx

Using integration by parts, answer = 1/4x 4 lnx - 1/16x 4 + C
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Answered by Imogen S. Maths tutor
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Factorise and solve X^2+8X+15=0

For any equation in the form ax^2+bx+c and a=1, the first step is to find a set of numbers. In this case, they must add up to 8 (b) and multiply to 15 (c). With trial and error, it can be found that these ar...
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Answered by James A. Maths tutor
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How to we work out the speed of an object at a certain point in its trajectory?

This depends on the path of the object and what information you have. You could be looking at conservation of kinetic and gravitational potential energy. Total energy must be the same at all times. We can ma...
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Answered by Camilla C. Physics tutor
2688 Views

Solve the inequality 5x - 7 > 2x +5

What does this inequality sign mean? That A "is greater than" B. We can treat inequalities as if they are = signs as long as we don't multiply or divide by negative numbers. What would happen then?...
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Answered by Camilla C. Maths tutor
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