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Nash Hopkins
Mathematics
28 April, 14:26
Solve the equation by factoring. 15=8x^2-14x
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Anastasia Ayers
28 April, 14:33
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8x^2 - 14x - 15 = 0
8 * - 15 = - 120 so we want 2 numbers which when added give us - 14
-20 and 6 look good, so we can write:-
8x^2 - 20x + 6x - 15 = 0
4x (2x - 5) + 3 (2x - 5) = 0
2x-5 is common so we have:-
(4x + 3) (2x - 5) = 0
4x + 3 = 0 or 2x - 5 = 0
solution is - 3/4 and 5/2
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Anya Zuniga
28 April, 14:53
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The solution is the result of 2x-5 = 0 and 4x+3 = 0.
x=5/2, - 3/4 (That's negative three fourths).
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