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Solve the equation ((x^2+2)^2)/x^2=9

First, note that we have x 2 in the denominator. This tells us that x 2 cannot equal to 0. So we have the boundary condition that x is not equal to 0. Now, to get rid of the denominator, we can multiply both...
VY
Answered by Vanesa Y. • Maths tutor
3355 Views

GCSE Maths: Expand and simpify 14(3x-7y)-2x(21-y)

=((14 3x)-(14 7y))+((-2x 21)-(-2x y))=42x-98y-42x+2xy=2xy-98y
NH
Answered by Nathan H. • Maths tutor
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Factorise 9a^2+6ab.

So what does it mean when we factorise? Well, we want to take the highest common factor (HCF) of both of these algebraic terms and we want to take that outside the back to simplify the expression. First, let...
RD
Answered by Rebecca D. • Maths tutor
4439 Views

How would I expand 3 brackets, e.g. (x + 3)(x + 4)(x + 2)?

Expanding 3 brackets is very much the same method as expanding 2. In the example you gave, to start you would expand the first two brackets out using the FOIL method (firsts, outsides, insides and leftovers)...
EW
Answered by Emma W. • Maths tutor
5833 Views

Find the minimum value of the quadratic equation: y = x^2 + 4x - 12

To find the minimum point of a quadratic equation, the quadratic should be written in the form '(x+a) 2 + b', i.e. completing the square, where the coordinates of the minimum point will be (-a,b). To complet...
RB
Answered by Rebecca B. • Maths tutor
7223 Views