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

x=3 or x=5

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Solve the simultaneous equations x+y=3 and-x+5y=-15.


Solve 3(x-2)=21


A straight line passes through the points (-2, 4) and (1, 10). What is (a) the gradient of the line, (b) the y-intercept of the line and (c) the equation of the line?


The functions f and g are defined on R , the set of real numbers by f(x) = x^2 - 5x +2, and g(x) = 1 - x. Find h(x) = f(g(x)), and j(x) = g(f(x)).


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