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På grafen under er det gitt en funksjon $f(x)=\\simplify{{a}*x^2+{b}*x+{c}}$ og en linje $l$ som går gjennom punktene $(-1,\\simplify{{a-b+c}})$ og $(1,\\simplify{{a+b+c}})$

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Bruk følgende definisjon:

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Hvis $f(x)\\geq g(x)$ på $[a,b]$, er arealet avgrenset av grafene til $f(x)$, $g(x)$, $x=a$ of $x=b$ ved folmelen

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\\[ A=\\int\\limits_a^b \\big(f(x)-g(x)\\big) dx \\]

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Finn likningen til linja $l: y=$[[0]]

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Finn arealet avgrenset av funksjonen $f(x)$ og linja $l$ (det blå området).

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