2 years ago

X²+10+7=0 by completing the square

Mathematics

2 answers:

Leviafan [203]2 years ago

7 0

Answer:

x=−5+3–√2

x=−5−3–√2

Step-by-step explanation:

love history [14]2 years ago

6 0

i only see numbers not no square

You might be interested in

-12 times 1over3 help.

sergey [27]

Answer:

-4

Step-by-step explanation:

4 0

3 years ago

Question number 8. Prove that 3 + √5 is an irrational number.

Marina86 [1]

Answer :

Let's assume the opposite of the statement i.e., 3 + √5 is a rational number.

$\\ \sf \: 3 + \sqrt{5} = \frac{a}{b} \\ \\ \qquad \: \tiny \sf{(where \: \: a \: \: and \: \: b \: \: are \: \: integers \: \: and \: \: b \: \neq \: 0)} \\$

$\\ \sf \: \sqrt{5} = \frac{a}{b} - 3 = \frac{a - 3b}{b} \\$

Since, a, b and 3 are integers. So,

$\\ \sf \: \frac{p - 3b}{b} \\ \\ \qquad \tiny \sf{ \: (is \: \: a \: \: rational \: \: number \:) } \\$

Here, it contradicts that √5 is an irrational number.

because of the wrong assumption that 3 + √5 is a rational number.

$\\$

Hence, 3 + √5 is an irrational number.

7 0

3 years ago

A new pair of basketball shoes costs $98.00 at the sporting goods store. If there is a 10% sales tax, what is the actual cost of

tiny-mole [99]

107.80$ is the actual cost of the shoes

5 0

2 years ago

Read 2 more answers

baseballs come in cartons of 84. a team orders 18 cartons of baseballs. how many baseballs does the team order ?

oksian1 [2.3K]

1512 is the answer

Do 18x84 to get your answer

3 0

3 years ago

Principle $1000 rate 8.5% and time 3 years A: $255 B: $170 C: $22.5 D: $17

attashe74 [19]

1000 x .085 x 3 = 255

answer is A: $255

5 0

3 years ago

Read 2 more answers