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Which shows the correct substitution of the values a, b, and c from the equation 0 = 4x2 + 2x – 1 into the quadraticformula below?Quadratic formula: x = -bt/b2 - 4 ac2aOX=-222 - 4(4)( - 1)2(4)0x =-2 V22 - 4(4)(1)2(4)OX=-2 V22 + 4(4)(-1)2(4)x =-2-22-4(4)(-1)2(4)

1 Answer

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The equation


4x^2\text{ + 2x -1 = 0}

comparing it with the standard quadratic equation


ax^2\text{ + bx + c = 0}

a=4 b=2 and c=-1

The quadratic formula is given by


X=\text{ -b }\pm\frac{\sqrt{b^2\text{ +4ac}}}{2a}\text{ }

substituting a=4 b=2 and c= -1 into the quadratic formula


\text{ X = -2 }\pm(√(2^2+4(4)(-1)))/(2(4))

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