Absolute (Modulus) Equations (Leaving Cert Mathematics): Quizzes

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Absolute (Modulus) Equations
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What is the definition of absolute value in math?

Magnitude of a number

How can you solve ∣d∣=5|d|=5?

Both methods work

What is the value of ∣−6∣|-6|?

66

When solving ∣2x−1∣=x|2x-1|=x, what's the first step?

Separate as two equations

Solve 2x−1=x2x-1=x. What is xx?

x=1x=1

What represent ∣x∣|x| in math?

Distance from origin

What is a key technique for solving ∣d∣=25|d|=25?

Square both sides

What does squaring both sides do in modulus equations?

Removes ∣∣| | symbol

What is the effect of squaring?

Could add extraneous solutions

What is the absolute value of 00?

00

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