Quadratic Equations

Hong Kong

Stage 4 - Stage 5

Find the value of the quadratic expression $3x^2$3`x`2 for each of the following $x$`x`-values.

a

$x=5$`x`=5

b

$x=-5$`x`=−5

Easy

Approx a minute

Find the value of the quadratic expression $3x^2+1$3`x`2+1 when $x=1$`x`=1.

Find the value of the following quadratic expression when $x=7$`x`=7.

Find the value of the following quadratic expression when $x=8$`x`=8.

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