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Differentiate the following: 5x^3

=3*5x^2 =15x^2
LA
Answered by Lavin A. • Maths tutor
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What is the area of a circle with a diameter of 3cm? (To 2 d.p.)

= pi * r^2 =pi * 1.5^2 =pi * 1.5 * 1.5 =7.07 cm^2
LA
Answered by Lavin A. • Maths tutor
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Solve the simultaneous equations 3x + 2y = 4, 4x + 5y = 17

X = -2 Y = 5
TK
Answered by Tahira K. • Maths tutor
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Integrate e^(2x)

To integrate e^(2x), integration by substitution can be used. 2x=u, you're left with an intergrand of e^u. S: = integral sign S: e^u dx. In this case we are still integrating the intergrand in terms of x so ...
EJ
Answered by Emil John M. • Maths tutor
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Common exam question: fully expand and simplify (x+3)(x-2) Student asks: how should I best answer the question? How do I do it step by step? My answer: First expand each individual part of the brackets separ...
MR
Answered by Michael R. • Maths tutor
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