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Tju [1.3M]
3 years ago
11

Which expression is equivalent to 13 – (-21)?

Mathematics
2 answers:
Tems11 [23]3 years ago
5 0

Answer:

13 + 21 = 34

Step-by-step explanation:

Two like signs become a positive sign, therefore minus a negative number become a plus.

Nataliya [291]3 years ago
4 0

Answer:

Step-by-step explanation:

13 + 21 = 34

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ONE solution: when both lines intersect at one point

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Answer:

A quadratic equation can be written as:

a*x^2 + b*x + c = 0.

where a, b and c are real numbers.

The solutions of this equation can be found by the equation:

x = \frac{-b +- \sqrt{b^2 - 4*a*c} }{2*a}

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If D< 0, we have the square root of a negative number, then we have a complex component:

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We have two complex solutions.

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