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I’ve been trying to figure this out and it just isn’t working, can anyone help?

I’ve been trying to figure this out and it just isn’t working, can anyone help?-example-1
User Jerrylow
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1 Answer

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Answer is ( -1, 6) and (2, 3) the points where the parabola and the linear line intersect
First solve -x + 5

y = -x + 5
Sub 0 for y and solve for x
0 = -x + 5
add x to each side to solve
0 + x = -x + x + 5
Simplify
x = 5

y = -x + 5
Sub 0 for x and solve for y
y = 0 + 5
y = 5

So we have (0, 5) and ( 5, 0) to draw your straight line

Now your parabola
X^2 - 2x + 3

Find the x of your vertex
- b/2a
- -2/ 2*1
2/2 = 1
X = 1

Sub x value of 1 into equation to find y

1^2 -(2*1 ) + 3
1 -2 +3
y = 2

So your vertex of the parabola is ( 1, 2)

Now we can find another point on the parabola to draw it

Since x vertex is 1, let’s try -1 to sub into the equation X^2 - 2x + 3

-1^2 (-2*-1) + 3
1 +2 +3
y = 6

So we can plot point ( -1, 6) on the graph

We know the axis of symmetry is x=1 so to find the other point of symmetry we see -1 is 2 places to the left to ( -1, 6) so we go 2 places to the right of x=1 + 2 = 3
Our symmetry point is (3, 6)
Draw your parabola and see where the parabola and the linear line intersect
Graph is attached


I’ve been trying to figure this out and it just isn’t working, can anyone help?-example-1
User Parth Modi
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8.2k points

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