Inequalities (AQA GCSE Maths): Quizzes

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Inequalities
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What does the symbol ≥\geq mean?

Greater than or equal to

What does the symbol << mean?

Less than

When must you flip the inequality sign?

When multiplying/dividing by negative

If 5>35 > 3, what happens when you multiply both sides by −1-1?

−5<−3-5 < -3 (sign flips)

Which circle type is used for strict inequalities (>> or <<) on a number line?

Open circle

For −4<x≤3-4 < x \leq 3, which circles are used at −4-4 and 33?

Open at −4-4, closed at 33

If x2>a2x^2 > a^2, what is the solution?

x>ax > a or x<−ax < -a

If x2<a2x^2 < a^2, what is the solution?

−a<x<a-a < x < a

When does a parabola open upward?

Positive x2x^2 coefficient

To solve where a quadratic is >0> 0 graphically, where do you look?

Where graph is above x-axis

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