# Test: Quadratic Function I - Ambitious

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Question 1:   Complete the square: ${x}^{2}-12x+18$
${\left(x-6\right)}^{2}-18$
${\left(x-6\right)}^{2}+15$
${\left(x-6\right)}^{2}-12$
${\left(x-6\right)}^{2}-24$
Question 2:   Complete the square: $3{x}^{2}-15x+21$
$3{\left(x-2.5\right)}^{2}+2.25$
$3{\left(x-2\right)}^{2}+5$
$3{\left(x-2.5\right)}^{2}+1.75$
$3{\left(x-2.5\right)}^{2}+3$
Question 3:   Complete the square: $2{x}^{2}+7x+13$
$2{\left(x-1.75\right)}^{2}+6.75$
$2{\left(x+1.5\right)}^{2}+6.25$
$2{\left(x+1.5\right)}^{2}+6.125$
$2{\left(x+1.75\right)}^{2}+6.875$
Question 4:   Find the sum of the roots of the quadratic equation: ${x}^{2}-15x+2.5=0$
$15$
$5$
$3$
$-15$
Question 5:   Find the sum of the roots of the periodic equation: $3{x}^{2}-4x+5=0$
$-4$
$4$
$2\frac{1}{3}$
$1\frac{1}{3}$
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