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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
8424 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
12961 Views

When do I use "sein" and when do I use "haben" in the past tense

&quot;Sein&quot; means literally &quot;to be&quot;. &quot;Haben&quot; means &quot;to have&quot;. When using the past tense, where there is motion you use &quot;sein&quot; with the appropriate pronoun and the...
SR
Answered by Sebastian R. • German tutor
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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 ...
MA
Answered by Mariam A. • Maths tutor
18871 Views

Solve for x: 2x^2 = 5x + 12

The first step to solving any equation is to work out what kind of equation it is. As this particular equation has only x's and numbers, and it has a x 2 term, we know that it is quadratic.Now that we know t...
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Answered by Samuel P. • Maths tutor
6068 Views