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Applying the quadratic forn Use the quadratic formula to solve 9x^(2)+5x-1=0

User Sivajith
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1 Answer

2 votes

Answer:

x = .16 or x = -.712

Explanation:

quadratic equation is, ax² + bx + c = 0

and quadratic formula is, x = -b ± √b² - 4ac / 2a

given equation is, 9x² + 5x - 1 = 0

a = 9, b = 5, c = -1

by substituting the values in the quadratic formula,

x = -5 ± √5² - 4*9*-1 / 2(9)

= -5 ± √25+36/18

= -5 ± √61 / 18

= -5 ± 7.81 / 18

= -5 + 7.81 / 18, -5 - 7.81 / 18

= 2.81/18, -12.81/18

= .16, -.712

User Meobyte
by
8.4k points
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