8. Systems
8.09 Key features of quadratic functions
Interactive practice questions
Find the value of the quadratic expression $3x^2$3x2 for each of the following $x$x-values.
a
$x=5$x=5
b
$x=-5$x=−5
Easy
1min
Find the value of the quadratic expression $3x^2+1$3x2+1 when $x=1$x=1.
Easy
< 1min
Find the value of the following quadratic expression when $x=7$x=7.
$4x+5x^2$4x+5x2Easy
< 1min
Find the value of the following quadratic expression when $x=8$x=8.
$6x^2+5x-4$6x2+5x−4Easy
< 1min
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