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3 years ago

What must be true of two rational expressions before they can be added?

Mathematics

2 answers:

cricket20 [7]3 years ago

8 0

They must have common denominators

klio [65]3 years ago

3 0

Answer:

D They must have common denominators.

Step-by-step explanation:

Rational expressions are fractions formed by two polynomials, one in the numerator and other in the denominator.

The numerator is the polynomial that is at the top of the fraction and denominator is the polynomial that is at the bottom of the fraction.

To add any fractions it is necessary that they have the same denominator, this applies to rational expressions, to add them it is required that they have the same polynomial in the denominator.

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Can someone please help me solve this? <br><br> 2x+5y=-1 <br><br> -10x-25y=5

fredd [130]

this is system of equations

2x + 5y = -1 times this one by 5 to make the y's opposite

-10x -25y = 5

10x - 25y = -5 (this is it times by 5, now add them)

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now since everything cancels and both sides are equal it has infinite solutions beaus they are actually the same line.

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alexandr402 [8]

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