Consider the function $y=x^2-2x-3.$ Complete the table. $x$$-2$$-1$$0$$1$$2$$3$$4$

Question

Consider the function $y=x^2-2x-3.$ Complete the table. $x$$-2$$-1$$0$$1$$2$$3$$4$ $y$ Draw the curve for $-2\le x\le4$. Use a vertical range of $-5\le y\le6$. On the same axes, draw the horizontal line $y=2$. Use the intersections to solve$$ x^2-2x-5=0. $$ Give your answers to 1 decimal place and explain why the line $y=2$ is appropriate.

Accepted Answer

(a) $y$-values: $5,0,-3,-4,-3,0,5$; (c) roots $x\approx-1.4,\ 3.4$.

Quadratic Functions, Equations and Inequalities

Quadratic Functions, Equations and Inequalities

Solution:

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