All categories

3 years ago

Solve 5x^2 - 7x+2 -0 by completing the square. What are the solutions?

Mathematics

1 answer:

trapecia [35]3 years ago

6 0

5x² - 7x + 2 = 0

5(x² - 7/5 x) + 2 = 0

5(x² - 7/5 x + 49/100 - 49/100) + 2 = 0

5(x² - 2 • 7/10 x + (7/10)²) - 49/20 + 2 = 0

5(x - 7/10)² - 9/20 = 0

5(x - 7/10)² = 9/20

(x - 7/10)² = 9/100

x - 7/10 = ± √(9/100)

x - 7/10 = ± 3/10

x = 7/10 ± 3/10

x = 10/10 = 1 or x = 4/10 = 2/5

You might be interested in

Seven is at most the quotient of a number d and -5. Write the sentence as an inequality.

Furkat [3]

Answer:

7>d/5

Step-by-step explanation:

7 is "at most" so it has a less than sign bahaha ur welcome

6 0

3 years ago

1. Suppose an arithmetic sequence has common difference 5,and the current

Anna [14]

Answer:

Step-by-step explanation:

5 0

3 years ago

|-4+5x|=16 Pls help Pls

Ronch [10]

Answer: i believe x = 4

Step-by-step explanation: 16 - |-4| which is adding two positives and that equals 20 so then its 5x = 20 divide 20 by 5 and you get 4

3 0

3 years ago

10+20+15 /2 will give branliest

Anettt [7]

Answer:

ans is 37.5 if u mention 10+20+15/2

4 0

3 years ago

Read 2 more answers

What is 1/2(10x +20y +10z) using the distributive property? also as an equivalent expression?

valkas [14]

Answer:

5x+10y+5z.

Step-by-step explanation:

The given expression is

$\dfrac{1}{2}(10x+20y+10z)$

We need to find the equivalent expression by using the distributive property.

By using the distributive property, the given expression can be written as

$\dfrac{1}{2}(10x+20y+10z)=\dfrac{1}{2}(10x)+\dfrac{1}{2}(20y)+\dfrac{1}{2}(10z)$

$=5x+10y+5z$

Therefore, the required expression is 5x+10y+5z.

8 0

3 years ago