What is the answer to -2x²+3x+12=0?
Can you use the quadratic formula or do you have to solve by factoring?
Update:is the answer -3±i squareroot 19?
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Can you use the quadratic formula or do you have to solve by factoring?
Update:is the answer -3±i squareroot 19?
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Factoring doesn't help. You must use the quadratic formula (or completing the square if you're into drudgery.)
No, the quadratic formula says:
x = (-3 ± √(9 - (4)(-2)(12)) / (-4)
x = ( -3 ± √105) / (-4)
x = (1/4) (3 ± √105)