Help please #2

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Determine where f(x) intersects the x-axis.

f(x)=x^2+9x+18

Guest Oct 15, 2015

Omi67 · Answer 1 · 2015-10-15T08:45:10

Hallo guest

heureka · Answer 2 · 2015-10-16T04:54:18

Determine where f(x) intersects the x-axis ( f(x) = 0 ).

f(x)=x^2+9x+18

$\begin{array}{rcl} &x^2+9x+18 &=& 0\\ \text{Factorisation }& (x+3)(x+6) &=& 0\\ &x_1 &=& -3\\ &x_2 &=& -6 \end{array}$