solve the following question Q.E by using formula 2x2-x-4=0
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Answer:
2x2 - x - 4 = 0
2x2 - 4x - 2x - 4 = 0
2x( x - 2 ) - 2 ( x -2 ) = 0
( x - 2 ) = 0 and ( 2x - 2 ) = 0
x = 2 and x = 2/2 = -1
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The answer is 8. .....
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