Question

Can someone explain the quadratic formula real quick lol

Answer 1

Answer:

D.x = (-3±√-7) / 2

Step-by-step explanation:

We have given  a quadratic equation.

x²+3x+4  = 0

From above equation, a = 1, b = 3 and c = 4

We have to find the solution of given equation bu using quadratic formula.

x  = (-b±√b²-4ac) / 2a

Putting given values in above formula, we have

x = (-3±√(3)²-4(1)(4) ) / 2(1)

x = (-3±√9-16) / 2

x = (-3±√-7) / 2 which is the answer.

Answer 2

Answer: OPTION D

Step-by-step explanation:

THe quadratic formula is shown below:

$x=\frac{-b\±\sqrt{b^2-4ac}}{2a}$

Given the quadratic equation shown in the image, you have that:

a=1

b=3

c=4

Therefore, when you susbtityte these values into the formula you obtain the following solution:

$x=\frac{-3\±\sqrt{3^2-4(1)(4)}}{2*1}$

$x=\frac{-3\±\sqrt{-7}}{2}$