Question

an object was launched at a height of x seconds and is modeled by f(x)=-6x²+12x+18?​

Answer 1

x= 3, -1

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Answer 2

$= - 6 {x}^{2} + 12x + 18$

$= - 6( {x}^{2} - 2x - 3)$

$= {x}^{2} - 2x - 3$

$= {x}^{2} - (3 - 1)x - 3$

$= {x}^{2} - 3x + x - 3$

$= x(x - 3) + 1(x - 3)$

$= (x +1)(x - 3)$