Question

A portion of the Quadratic Formula proof is shown. Fill in the missing statement.

A. x plus b over 2 times a equals plus or minus the square root of b squared minus 4 times a times c, all over 2 times a

B. x plus b over 2 times a equals plus or minus the square root of b squared minus 4 times a times c, all over 4 times a

C. x plus b over 2 times a equals plus or minus the square root of b squared minus 4 times a times c, all over 2 times a squared

D. x plus b over 2 times a equals plus or minus the square root of b squared minus 4 times a times c, all over a

Answer 1

The answer should be A but look at the picture I attached that will help you get the right answer for this table.

Answer 2

Option A.

Explanation:

we have

`x+(b)/(2a) =\pm\sqrt{(b^2-4ac)/(4a^2)}`

Simplify the right side of the equation

we know that

`\pm\sqrt{(b^2-4ac)/(4a^2)}=\pm(√(b^2-4ac))/(√(4a^2))=\pm(√(b^2-4ac))/(2a)`

so

The expression is

`x+(b)/(2a)=\pm(√(b^2-4ac))/(2a)`

therefore

x plus b over 2 times a equals plus or minus the square root of b squared minus 4 times a times c, all over 2 times a