Factorise and solve x^2 -8x=15=0

x=3 or x=5

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Solve x^(2)-x-12


A particle is moving along a straight line. The displacement of the particle from O at time t seconds is s metres where s = 2t^3 – 12t^2 + 7t. Find an expression for the velocity of the particle at time t seconds.


Solve the simultaneous equations y=2x and y=x+3


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