Question

Explain how to solve 5x^2-3x=25 by completing the square. What are the solutions?

((You'll get 35 points for this))
(I need a good explanation to help me understand this please, thank you)

Answer 1

5x2 is 10 so you subtract 3 3x like this

5x2=10-3=7-3=4 then find the formula.

Explanation:

We do completing the square as follows:

1. Put all terms with variable on one side and the constants on the other side.

5x^2 - 3x = 25

2. Factor out the coefficient of the x^2 term.

5(x^2 - 3x/5) = 25

3. Inside the parentheses, we add a number that would complete the square and also add this to the other side of the equation. In this case we add 9/100 and on the other side we add 9/20.

5(x^2 - 3x/5 + 9/100) = 25 + 9/20

4. We simplify as follows:

5(x^2 - 3x/5 + 9/100) = 25 + 9/20

5(x - 3/10)^2 = 509/20

(x - 3/10)^2 = 509/100

x1 = √(509) /100 + 3/10

x2 = -√(509) /100 + 3/10