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Expand and simplify 9(x+3)-2(3x-4)

9(x+3)-2(3x-4)9x+27-6x+83x+35
KS
Answered by Kiran S. • Maths tutor
3882 Views

Expand the brackets (x-3)(x+4)

When dealing with questions to do with expanding brackets, you must multiply every term in one bracket with all the others in the second bracket. So for this question, we can see we have 4 terms in total: Le...
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Answered by Ameer A. • Maths tutor
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Solve these simultaneous equations. 2x + y = 18 x - y = 6

With simultaneous equations there is more than one unknown. First we’ll get one unknown on its own so we rearrange the bottom equation to get x on its own. By adding y to each side of the equation this leave...
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Answered by Lizzie S. • Maths tutor
6317 Views

Find the value of x: x^2-3x-3=1

To begin this question you need to bring all of the terms to one side, so the equation equals 0. It is easiest to do this by subtracting 1 from each side.x^2-3x-3-1=1-1x^2-3x-4=0Now we need to factorise the ...
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Answered by Emma H. • Maths tutor
4005 Views

What is the equation of the straight line perpendicular to the midpoint of the straight line that passes through (0,5) and (-4,7)?

Firstly, it's important to note that the question concerns straight lines, so it will be possible to express the answer in the form y=mx+c where m is the gradient and c is the y-intercept.To start, we need t...
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Answered by Adam L. • Maths tutor
4271 Views