Solve x^2-x-12=0
x2 - x - 12 = 0Factorise to get (x-4)(x+3)=0This gives (x-4)=0 or (x+3)=0So x=4 or x=-3
HS
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Work out 2^3 + 4^2
Given that f(x ) = 4x^3 + 12, evaluate f ( −2) .