2 the thank you to sparkling up this extremely rapidly: Factoring and using the Quadratic formula In the two case, the 1st element you will possibly desire to do is desperate the equation equivalent to 0. try this by technique of including 24 to the two aspects. 2x² + 19x + 24 = 0 Factoring: because of the fact the main suitable coefficient (2) isn't a million, you could ingredient by technique of using the "Grouping" approach. Multiply the 1st and final numbers, then see what components of this upload to grant you the middle variety: 2*24 = forty 8. What 2 numbers multiply to get forty 8, and upload to get 19? sixteen*3 = forty 8, and sixteen+3 = 19, so the numbers are sixteen and 3. this means you could chop up that center 19x into 3x + 16x Now the equation sounds like this: 2x² + 3x + 16x + 24 = 0 group the 1st 2 words and the 2d 2 words mutually: [2x² + 3x] + [16x + 24] = 0 Now ingredient those words in my opinion: x(2x + 3) + 8(2x + 3) = 0 because of the fact that the two the x and the 8 are expanded by technique of (2x+3), you could ingredient (2x+3) from the two to get: (2x + 3)(x + 8) = 0 If the two (2x + 3) or (x + 8) equivalent 0, then the finished element equals 0 (because of the fact any variety circumstances 0 produces 0) 2x + 3 = 0 ; 2x = -3 ; x = -3/2 x + 8 = 0 ; x = -8 so x = -3/2 or -8
2016-12-15 13:39:36
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answer #4
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answered by Anonymous
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