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Draw a graph of x = (y + 4)/4

step 1: re-arrange the function in a nicer wayx = (y + 4)/44x = y + 4y = 4x - 4step 2: draw the graphthis is a stright line going through y axis at -4 and x axis at 1, with gradient of 4
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Answered by Rimantas K. • Maths tutor
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Integrate (x+2)^2 dx

There are multiple methods that be applied here to reach a solution, integration by substitution or by applying the basic rules of integration. The first step would be to expand the expression within the par...
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Write 3a - a x 4a + 2a in its simplest form.

= 5a - 4a^2The rules of BODMAS (brackets, Orders, Division, Addition, Subtraction) applies. Times the "a" with "-4a" first, forming 4a squared (4a^2). Then group the "3a" and &q...
RK
Answered by Rachel K. • Maths tutor
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Integrate (tanx)^2

Method: We use the trigonometric identity (tanx)^2 +1 = (secx)^2 to understand that (tanx)^2 can be written as (secx)^2-1.We then use the formula booklet to identify that (secx)^2 is a given integral and its...
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Answered by Tutor382317 D. • Maths tutor
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How do I find the roots of a quadratic?

e.g. given x^2 +3x -8 = 0using the quadratic formulayou find x = (-b +- sqrt(b^2 -4ac))/2ayou then find one root using the plus instead of plus minus sign, and the other root using the minus instead of plus ...
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Answered by Tutor382317 D. • Maths tutor
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