Factorise the following-: x²-2x-24
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When looking to factor a trinomial of the form y = ax² + bx + c, where a = 1, you must find two numbers that multiply to c and that add to b.
The two numbers we are looking for are 6 and -4, since 6 X -4 = -24 and 6 + (-4) = 2
x2 + 2x - 24 = 0
(x +6)(x - 4) = 0
x = -6 and 4
The solutions are -6 and 4.
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