2 years ago

Which of the following could not be a value of n?13O A. 7B. 10C. 13O D. 222

2 answers:

8 0

The triangle inequality says that the sum of the the two shorter sides of a triangle must be greater than the third side.
So try and see which one of the options does not satisfy the triangle inequality.

ZanzabumX [31]2 years ago

7 0

N cannot be 22. It can be proved by the theory of triangle, the sum of any two sides of triangle must be greater than the another third side.

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Solve −3x2 − 4x − 4 = 0

kkurt [141]

This is a quadratic formula with a general form of a²x + bx + c = 0. For quadratic equations, we can solve for its two roots using the quadratic formula shown in the attached picture.

a = -3
b = -4
c = -4

x = [-(-4) + √(-4)² - 4(-3)(-4)]/2(-3) = <em>2 + √-32/2</em>
x = [-(-4) - √(-4)² - 4(-3)(-4)]/2(-3) =<em> 2 - √-32/2</em>