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3 years ago

1. Which is equivalent to the expression below? (3.x2 – 2x + 5) - (2x2 – 5x + 1)

Mathematics

2 answers:

antiseptic1488 [7]3 years ago

7 0

Answer:

x^2 + 3x + 4

Step-by-step explanation:

(3.x2 – 2x + 5) - (2x2 – 5x + 1) Combine like terms: x^2, x and constants:

3x^2 - 2x^2 -2x + 5x + 5 - 1

This condenses to

x^2 + 3x + 4

Nana76 [90]3 years ago

5 0

Answer:

x = 6

x = 1

Step-by-step explanation:

(3x² - 2x + 5) - (2x² - 5x + 1)

= 3x² - 2x² - 2x - 5x + 5 + 1

= x² - 7x + 6

= (x - 6)(x - 1)

x - 6 = 0

x = 6

x - 1 = 0

x = 1

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Considere as seguintes afirmações: I. O inverso de 0,2 é 5. II. O triplo de \frac{2}{5} é \frac{6}{15}. III. A metade de 0,5 é \

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Answer:

I e III

Step-by-step explanation:

Recebemos declarações na questão acima para considerar.

Declaração I. O inverso de 0,2 é 5.

Matematicamente, isso é escrito como:

1 / 0,2

0,2 = 2/10

Portanto: 1 ÷ 2/10 = 1 × 10/2

= 5

Afirmação 1 é verdadeira

Declaração II.

O triplo de 2/5 é 6/15.

Triplo de 2/5 = 2/5 + 2/5 + 2/5

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= 6/5

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Convertendo em fração

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Declaração III está correta

Portanto, as afirmações verdadeiras são I e III

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