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dangina [55]
3 years ago
13

Frações Algébricas - 3* caso

D" id="TexFormula1" title="\frac{x+1}{2x-4} + \frac{x-1}{3x-6}" alt="\frac{x+1}{2x-4} + \frac{x-1}{3x-6}" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
Ulleksa [173]3 years ago
4 0

Answer:

\dfrac{5x + 1}{6(x - 2)}

\dfrac{5x + 1}{6x - 12}

Step-by-step explanation:

Fatorizam-se os denominadores.

2x - 4 = 2(x - 2)

3x - 6 = 3(x - 2)

O minimo multiplo comum dos denominadores e

2(3)(x - 2)

\dfrac{x + 1}{2x - 4} + \dfrac{x - 1}{3x - 6} =

= \dfrac{3(x + 1)}{2(3)(x - 2)} + \dfrac{2(x - 1)}{2(3)(x - 2)}

= \dfrac{3(x + 1) + 2(x - 1)}{6(x - 2)}

= \dfrac{3x + 3 + 2x - 2)}{6(x - 2)}

= \dfrac{5x + 1}{6(x - 2)}

= \dfrac{5x + 1}{6x - 12}

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The sum of two numbers is 6, their difference is 4, find the two numbers. What is their product?
Firlakuza [10]

Answer:

The two numbers are 5 and 1. Their product is 5

Step-by-step explanation:

x + y = 6 (*)

x - y = 4 (**)

Let (*) + (**)

--> (x+y) + (x-y) = 6 + 4

<=> 2x = 10 <=> x = 5

Substitute x= 5

(*) <=> 5 + y = 6

<=> y=1

Answer: (x,y) = (5,1)

Their product: x.y = 5x1 = 5

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3 years ago
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irga5000 [103]
That's what I think but if im wrong im sorry:
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Answer:

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Step-by-step explanation:

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Triss [41]

The value of the given expression is \frac{-13}{20}.

Solution:

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Let us first convert mixed fraction into improper fraction.

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Substitute this in the given expression.

\frac{3}{4} \times3\frac{2}{5}-\frac{5}{5}=\frac{3}{4} \times\frac{7}{15}-\frac{5}{5}

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To simplify the above expression, 21 and 60 are cancelled by 3.

                 =\frac{7}{20}-\frac{1}{1}

Do cross multiplication to make the denominator same.

                 =\frac{7}{20}-\frac{20}{20}

                 =\frac{7-20}{20}

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The value of the given expression is \frac{-13}{20}.

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3 years ago
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KIM [24]

answer

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Step-by-step explanation:

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