Question

4 quarditic equation formula

Answer 1

Answer:

ax2 + bx + c = 0 is a quadratic equation

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Step-by-step explanation:

Answer 2

Answer:

x = (-1 + √5) / 2 and x = (-1 - √5) / 2

Step-by-step explanation:

To solve the quadratic equation x^2 + x - 1 = 0 using the quadratic formula:

First, identify the coefficients a, b, and c in the standard form equation ax^2 + bx + c = 0:

a = 1, b = 1, c = -1

Next, substitute the values of a, b, and c into the quadratic formula:

x = [-b ± √(b^2 - 4ac)] / 2a

x = [-1 ± √(1 - 4(1)(-1))] / 2(1)

x = [-1 ± √5] / 2

Therefore, the solutions to the quadratic equation x^2 + x - 1 = 0 are:

x = (-1 + √5) / 2 and x = (-1 - √5) / 2