All categories

3 years ago

Use complete the square to solve 5x²-7x-3=0

Mathematics

2 answers:

gulaghasi [49]3 years ago

5 0

Step-by-step explanation:

to take out -(7/5)^2 out u have to multiply with 5 which is out of the bracket.

hope it's helps

Yuki888 [10]3 years ago

3 0

Step-by-step explanation:

ax2 + bx + c = 0

x12 = (-b ± √D) / 2a , D = b2 - 4ac .

5x2 + 7x + 3 = 0

a = 5 , b = 7 , c = 3

D = 49 - 60 = - 11 , x1 = (-7 - i √11) / 10

x2 = (-7 + i √11) / 10

You might be interested in

Translate the phrase into a math expression. 30 added to a number that is decreased by 5

grin007 [14]

If you want to translate the phrase 30 added to a number that is decreased by 5 into a math expression, you can do it like this:

a number ... n
30 added ... + 30
decreased by 5 ... - 5

Now you just have to put this together: n + 30 - 5 or n - 5 + 30. So, the correct result is a.

3 0

3 years ago

3. A jet traveled at an average speed of 681 kilometers an hour. At that rate, how far did the jet go in 7 1/4 hours?

Burka [1]

$\stackrel{mixed}{7\frac{1}{4}}\implies \cfrac{7\cdot 4+1}{4}\implies \stackrel{improper}{\cfrac{29}{4}} \\\\[-0.35em] ~\dotfill\\\\ \begin{array}{ccll} K ms&hours\\ \cline{1-2} 681 & 1\\ x& \frac{29}{4} \end{array} \implies \cfrac{681}{x}=\cfrac{1}{~~ \frac{29}{4}~~}\implies \cfrac{684}{x}=\cfrac{4}{29} \\\\\\ 19836=4x\implies \cfrac{19836}{4}=x\implies 4959=x$

6 0

2 years ago

If x + y = –10 and x - y = 2, what is the value of x?

luda_lava [24]

Answer:

y -10

x graph

Step-by-step explanation:

5 0

3 years ago

If 49=83m, What is the value of m?

maw [93]

Answer:

49/83 = m

Step-by-step explanation:

49=83m

Divide each side by 83

49/83 = 83m/83

49/83 = m

6 0

3 years ago

378+567-142÷5=?<br>456(325-541)÷32=?

Schach [20]

Answer:

378+567-142÷5= 916.6

456(325-541)÷32= -3078

Step-by-step explanation:

5 0

3 years ago

Use complete the square to solve 5x²-7x-3=0​

Use complete the square to solve 5x²-7x-3=0