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Expand the following brackets, (6x^2-4)(2x+3)

12x³+18x²-8x-12

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Factorise the quadratic equation: 3x^2+x-2

Solve the simultaneous equations 4x + 7y = 1 and 3x +10y = 15.

The functions f and g are such that f(x)=5x+2 and g(x)=-x-4. a) Find fg(x). b) Find ff(x). c) Solve fg(x) = ff(x).

From factorising a^2-b^2 hence or otherwise simplify fully (x^2 + 4)^2 - (x^2-2)^2

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