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solve 2x 2 –x – 1 = 0. first, move the constant term to the other side of the equation. 2x 2 –x = 1 dividing both sides by 2. x 2 –x/2 = ½ add the square of half of the coefficient of x, (b/2a) 2 , on both the sides, i.e., 1/16 x 2 –x/2 + 1/16...
The square root of a number is the inverse operation of squaring a number. The square of a number is the value that is obtained when we multiply the number by itself, while the square root of a number is obtained by finding a number that when squared gives the original number. If 'a'...
In order to calculate the passing rate of a test you'll need to know how many students took the test in total, along with how many students passed. Sometimes it takes a little deductive reasoning to get this information; for example, if you're told that 740 students passed a school-wide...
a universal constant that shows up naturally in calculations with round objects. The second variable, r, stands for radius. Radius is the measurement from the center of the circle to the edge. To find the area of the circle, the radius will be squared before being multiplied by π...
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A perfect cube is a number that can be written as a^3. When factoring a perfect cube, you would get a * a * a, where "a" is the base. Two common factoring procedures dealing with perfect cubes are factoring sums and differences of perfect cubes. To do th
Factor out your unknown variables. Since x is squared, when you factor it out, you will have one x. See the next section for more on dealing with unknown variables. Write out your new equation. Since 3 and 4 seem to be right, write out your equation as (x + 3) (x + 4) = 0...
1 The command fractions() turns the decimals into fractions to improve readability. Now that the condition weights from the hypotheses have been written into the hypothesis matrix, the third step of the procedure is implemented: a matrix operation called the “generalized matrix inverse“2 is ...