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Irina-Kira [14]
4 years ago
8

Factoring by grouping1) x² + x² – 3x – 3 = 0​

Mathematics
1 answer:
N76 [4]4 years ago
4 0

The value of x is x\geq -0.686 and x\leq 2.186

Step-by-step explanation:

Factorisation is not possible in this case since the 2 pairs available will not be giving the same outcome as required in factorisation.

This is a quadratic equation

x² + x² – 3x – 3 = 0​

2x² - 3x - 3 = 0

<u>Quadratic formula:</u>

\frac{-b±\sqrt{b^{2} }-4ac }{2a}

a=2

b= -3

x= -3

\frac{-(-3)+\sqrt{-3^{2} }-4(2)(-3) }{2(2)}

= \frac{3+\sqrt{33} }{4}

= 2.186

or

\frac{-(-3)-\sqrt{-3^{2} }-4(2)(-3) }{2(2)}

= \frac{3-\sqrt{33} }{4}

= -0.686

Therefore, the value of x is,

x\geq -0.686 and x\leq 2.186

Keyword: Factoring, Quadratic

Learn more about quadratic/factoring at

  • brainly.com/question/10666510
  • brainly.com/question/4460262

#LearnwithBrainly

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Answer:

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Step-by-step explanation:

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r = interest rate, we were told to ignore hence, r = 0

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Hence,

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= $105.83

Approximately to the nearest dollars

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3 years ago
What is the scale factor of the dilation?
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Step-by-step explanation:

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Write 7.75 x 10^-3 in standard notation​
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Answer:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

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4 years ago
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What is the equation of a line that passes through the point (9, -3) and is parallel to the line whose equation is 2x-3y=6
DaniilM [7]

Answer:

Step-by-step explanation:

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-3y = -2x + 6

y = -2x/-3 + 6/ -3

y = 2x/3 - 2             {y =mx + c}

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The required line's slope is also 2/3 as it is parallel to this line

Point(9, -3)

y -y1 = m(x-x1)

y - (-3) = 2/3 (x - 9)

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7 0
3 years ago
Dan has the same number of nickels and dimes in his piggy bank. If the total amount of those coins is $0.90, how many of each co
Karolina [17]

Hello There!

<u><em>n - d = 0</em></u>

<u><em>5n+10d = 90</em></u>

<u><em>----------------------</em></u>

<u><em>n-d = 0</em></u>

<u><em>n+2d = 18</em></u>

<u><em>-------------------</em></u>

<u><em>Subtract and solve for "d":</em></u>

<u><em>3d = 18</em></u>

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