$$\[ y=x^{2}+\frac{1}{x}, x \neq 0 \]$$ By drawing suitable straight lines on the grid, solve the following equations. $$$x^{2}+\frac{1}{x}+x-1=0$$$ $$\[ x= ............................................ \]$$

Mathematics

IGCSE&ALevel

CAIE

Exam No：0580_w20_qp_42 Year：2020 Question No：7(c)(ii)

Answer:

$y=1-x$ ruled
and
$-1.9$ to $-1.75$

Knowledge points:

E2.11.2 Solve associated equations approximately, including finding and interpreting roots by graphical methods. (Find turning points of quadratics by completing the square.)

Solution:

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$$\[ y=x^{2}+\frac{1}{x}, x \neq 0 \]$$ By drawing suitable straight lines on the grid, solve the following equations. $$\(x^{2}+\frac{1}{x}+x-1=0\)$$ $$\[ x= ............................................ \]$$

Answer:

Knowledge points:

Solution:

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