Solve x2 + 12x = -20 by completing the square.
1.
Add to both sides of the equation. The value of in this equation is
2. Write the left side of the equation as a binomial squared. The left side of the equation becomes
3. Use the square root property of equality.
4. Isolate the variable: x =
Done

the forst and 3rd

step-by-step explanation:

the image is given below

since the options are not given so we draw it from the equation

the given equation is

y = (x-1) (x+4)

y = y² + 3x - 4

the above equation is a quadratic equation which will have two roots. if we draw the graph for it, it will look like this

the correct answer option is d. la = πrs.

step-by-step explanation:

we know that for a right cone, the lateral surface area is given by:

lateral area of right cone =

here the value under the square root is equal to slant height so replacing this value by in the formula to get:

lateral area of right cone =

therefore, the correct answer option is d.