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x2-4x-165 = (x-15)(x+11) when factored
(x+4)(x-7)
x(x + 3)(x - 4)
1/x4
2
4(x - 1)(x + 1)
(x - 5)(x + 4)
(x + 2)(x - 4)
4
x = ? 42 = x squared minus x
3x2 - 11x - 4 = (x-4)(3 x + 1)
(x+2)(x−4)
X2 - 4= (x + 2)(x - 2)===========
(x-1)(x-4)