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SVETLANKA909090 [29]
4 years ago
6

If f(x) x^2-3x find f(-1.8

Mathematics
1 answer:
ICE Princess25 [194]4 years ago
8 0
The answer = 2.16
Good luck
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2 years ago
What is the sum of the solutions of the equation 1.5x^2 - 2.5x -1.5 = 0? Round to the nearest hundredth. ​
BARSIC [14]

Answer:

Sum = 1.67

Step-by-step explanation:

Given:

1.5x^2 - 2.5x -1.5 = 0

Required

Determine the sum of the solutions

This question will be answered using quadratic formula:

x = \frac{-b\±\sqrt{b^2 - 4ac}}{2a}

Where:

a = 1.5

b = -2.5

c = -1.5

So, we have:

x = \frac{-(-2.5)\±\sqrt{(-2.5)^2 - 4*1.5*-1.5}}{2*1.5}

x = \frac{2.5\±\sqrt{6.25 +9}}{3}

x = \frac{2.5\±\sqrt{15.25}}{3}

x = \frac{2.5\±3.91}{3}

x = \frac{2.5+3.91}{3} or x = \frac{2.5-3.91}{3}

The sum of the solution is then calculated as:

Sum = \frac{2.5+3.91}{3} + \frac{2.5-3.91}{3}

Take L.C.M

Sum = \frac{2.5+3.91+2.5-3.91}{3}

Sum = \frac{5}{3}

Sum = 1.67

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3 years ago
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Rina8888 [55]

Answer:

c

Step-by-step explanation:

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4 years ago
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