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Question

Draw the graph of y=2x2 and find the value of 5 using the graph.

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Solution

Step 1: Prepare the table of values for y=2x2
x 0 1 1 2 2 5
y 0 2 2 8 8 10

Step 2: Plot all the points on the graph sheet and draw the parabola

Step 3: When x=5,y=2(5)2=10
Draw the straight line y=10 parallel to x-axis.
Step 4: From the intersecting points of the parabola and the straight line, draw perpendiculars to the x-axis.
The point on x-axis at which the perpendiculars meets are the value of 5.
x=±2.3
5=±2.3

609670_563000_ans_0b9ab90564ef4287af4c1354bba93cea.png

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