Mathematics: Graphical Solution of Quadratic Equation (Part2)(SS1-SS2)
Автор: Model Physics,Maths...,Kids Edu.Videos
Загружено: 2026-02-13
Просмотров: 53
Описание:
Welcome to Model Physics Mathematics Lessons. In this lesson, i solve the quadratic equation: 2x^2 + 3x - 3= 0 graphically for values of x ranging from -4 to +4 .
I begin by forming a table of values for y = 2x^2 + 3x - 3.
Using the given scale:
1cm = 1 unit on the x-axis
1cm = 5 units on the y-axis
I carefully plot the corresponding points on the graph sketched on the magnetic whiteboard and draw a smooth parabola through them.
Since the equation is quadratic, the graph will be a parabola opening upward(because the coefficient of x^2 is positive).
The roots of the equation are the values of x where the graph cuts the x-axis (i.e.,where y=0)
From the graph, the approximate roots are: x=0.5 and x=-2.1.
These are the solutions to the equation 2x^2 + 3x - 3 = 0.
This method helps students understand the connection between algebra and graphical representation of functions.
Perfect for WAEC, NECO, and secondary school mathematics revision.
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