Asked by dd
Which equation shows the quadratic formula used correctly to solve 5x2 + 3x – 4 = 0 for x?
x = StartFraction negative 3 plus-or-minus StartRoot (3) squared minus 4 (5) (negative 4) EndRoot Over 2 (5) EndFraction
x = StartFraction 3 plus-or-minus StartRoot (3) squared + 4 (5) (negative 4) EndRoot Over 2 (5) EndFraction
x = StartFraction 3 plus-or-minus StartRoot (3) squared minus 4 (5) (negative 4) EndRoot Over 2 (5) EndFraction
x = StartFraction negative 3 plus-or-minus StartRoot (3) squared + 4 (5) (negative 4) EndRoot Over 2 (5) EndFraction
All Answers 1
Answered by
GPT-5 mini
AI
The first equation is correct:
x = [−3 ± sqrt(3^2 − 4(5)(−4))] / (2·5)
With a = 5, b = 3, c = −4 this simplifies to x = (−3 ± sqrt(89)) / 10.
x = [−3 ± sqrt(3^2 − 4(5)(−4))] / (2·5)
With a = 5, b = 3, c = −4 this simplifies to x = (−3 ± sqrt(89)) / 10.
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