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(x - 3)(x + 4) = 0 Solve for x

(x - 3)(x + 4) = 0 x=3 and x=-4

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Expand (x+3)(x+4)

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

f(x)=2x+c, g(x)=cx+5, fg(x)=6x+d; c and d are constants. Work out the value of d

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