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Subjects>Math>Math & Arithmetic

What is the absolute value of 7 plus 9i?

Anonymous

∙ 9y ago

Updated: 10/24/2022

I see that you already got a specific answer. More in general, you can calculate the absolute value of a complex number using the Pythagorean theorem. You can also use the "rectangular to polar" conversion, available on just about any scientific calculator - which will give you both the absolute value, and the angle. However, using this function is a bit confusing, and you'll probably have to check the calculator manual.

Wiki User

∙ 9y ago

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More answers

The absolute value of a complex number z = x + iy is sqrt(x^2 + y^2).In this case, x = 7 and y = 9 so that |z| = sqrt(7^2 + 9^2) = sqrt(49 + 81) =sqrt(130) = 11.4018, approx.

Wiki User

∙ 9y ago

|7 + 9i| = √(7² + 9²) = √130 ≈ 11.402

Wiki User

∙ 9y ago

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Continue Learning about Math & Arithmetic

What is the absolute value of negative 2 plus negative 5?

Absolute value of -2+(-5) is 7.

Is -7 equal to plus 7 in integers?

no if its absolute value of -7 and +7 then its equal

Absolute value of x plus 7?

The absolute value of any number is the "distance from zero". If the expression is negative, it is converted to positive. The absolute value of x+7 can be either x+7 (if x+7 is positive) or -(x+7) (if x+7 is negative).

Is the absolute value of the opposite of 7 the same as the opposite of the absolute value 7?

No. The absolute value of the opposite of 7 is 7, but the opposite of the absolute value of seven is -7.

How does the absolute value of -7 compare to the absolute value of 7?

They are the same. the absolute value is always positive

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