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Solve the equation 3a^2+4a+1=3 for all values of a. Give your answers to 3 significant figures.

First take the 3 over the other side to make the right hand side zero, turning it into a homogeneous equation: 3a 2 +4a-2=0. Since the expression on the left hand side cannot be factorised, we have to use qu...
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Answered by Nida A. • Maths tutor
4301 Views

What is the indefinite integral of ln(x) ?

We can use integration by parts to solve this question. If we look at the formula for Integration by parts: ∫u(dv/dx)dx = uv - ∫ v (du/dx) dx , we see that u must be multiplied by something else so therefore...
DM
Answered by Dawud M. • Maths tutor
5548 Views

Solve the following inequality: x^2 + x -12<0

Firstly we have to factorize the quadratic. We do this by finding two numbers that multiply to -12 and add to 1.Looking at the factors of 12 we can see that x 2 +x-12= (x-3)(x+4)because -3 x 4 = 12 and 4-3=1...
JS
Answered by Joy S. • Maths tutor
8534 Views

Make y the subject of the following equation: 2x - y = 5

If we want to make y the subject of our equation, we need to re-arrange our equation so that y is on its own on one side of the equation. Such as y=...To re-arrange our equation, we need to decide if we want...
MW
Answered by Myles W. • Maths tutor
13141 Views

Solve (3x-2)/4 -(2x+5)/3 =(1-x)/6

The easiest way to solve this is to first eliminate the denominators by multiplying the whole expression by the lowest common multiple of 4, 3 and 6. In this case it is 12. If each fraction is multiplied by ...
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Answered by Mariam A. • Maths tutor
19115 Views