Презентация по математике на английском языке для 8 класса системы квадратных неравенств

1. граница 2. область 3. определять 4. неравенство 5. штриховать 6. сплошной 7. окружность 8. критические

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Variable [veərɪəbl]- переменная Indicated [ɪndɪkeɪt]- показывать, обозначать Overlap [ˌəuvəlæp]- перекрывать Spot [spɔt]- точка Separately [sep(ə)rətlɪ]- отдельно Number line -числовая прямая

Write each inequalities as an equations and solve separately. Plot the solutions (called critical x-values) on a number line. Test an x-value in between the critical values and determine the range that is true for the inequality. Find the intersection of solutions.

Solve next system -1 1 -2 2 х Solution of system:

Graph both parabolas first. Then shade the areas indicated. The solution to the system is the part that is shaded by all inequalities. If there are no overlapping spots, there is no solution .

. The overlapped area can satisfy both inequalities. Thus, it is the solution to this system of quadratic inequalities Solve next system

Solve next system There is no overlapped area which can satisfy both inequalities. Thus, there is no solution to this system of quadratic inequalities.

Problems Solve system of inequalities In two variables: Solve system of inequalities In one variable:

Homework Learn new words and rules.