What is the positive solution to the equation 0 = –x2 + 2x + 1? quadratic formula: x = –2 + 2 – 1 + –1 +

The standard form of a quadratic equation is :

ax² + bx + c = 0

And the quadratic formula is:

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a} .

So, first step is to compare the given equation with the above equation to get the value of a, b and c.

So, a = -1, b = 2 and c = 1.

Next step is to plug in these values in the above formula. Therefore,

So, x =

which expression represents the approximate length of bc?

step-by-step explanation: