3 years ago

Which step has the mistake in solving for roots?

Mathematics

1 answer:

REY [17]3 years ago

7 0

Answer:

Step-by-step explanation:

2x² - 7x - 3 = 1

Step 1: 2x² - 7x - 4 = 0

Step 2: incorrect.

Use Quadratic Formula to solve for roots.

x = [7 ± √(7² – 4·2(-4))] / [2·2]

= [7 ± √81] / 4

= [7 ± 9] /4

= -0.5, 4

You might be interested in

Find the values of x,y, and z. The diagram is not to scale.

vazorg [7]

All the angles must add to 180degrees in a triangle.

180 = 59 + 35 + x
180 = 94 + x
86 = x

Supplementary angles x and z add to 180
180 = x + z
180 = 86 + z
94 = z

Now the last triangle is with angles 11, z, and y
they must add to 180 so...
180 = 11 + z + y
180 = 11 + 94 + y
180 = 105 + y
75 = y

Hope this helps!

3 0

3 years ago

jeff volunteers his time by working at an animal shelter. each year he works for total of 240 hours. so far this year, he has wo

aleksandrvk [35]

Answer:

h=240-97

Step-by-step explanation:

5 0

2 years ago

Determine the location of a point (x, y, z) that satisfies the given condition. xyz > 0

ollegr [7]

Xyz>0, a-location of a point
if
a∈{{x<0∧y<0∧z>0}∨{x>0∧y<0∧z<0}∨{x<0∧y>0∧z<0}∨{x>0∧y>0∧z>0}}

8 0

3 years ago

4. If u = {1,2,3,....10) A = { odd numbers up to 9} B = {numbers less than 7). Write out the members of the following sets: (i)

icang [17]

Answer:

i. {1,2,3,4,5,6,7,9}

ii. {1,3,5}

iii. {1,2,3,4,5,6,8,10}

Step-by-step explanation:

U= {1,2,3,4,5,6,7,8,9,10}

A= {1,3,5,7,9}

B= {1,2,3,4,5,6}

A U B = {1,2,3,4,5,6,7,9}

A n B = { 1,3,5}

A (prime) U B =

A(prime)= {2,4,6,8,10}

Therefore A(prime)= {1,2,3,4,5,6,8,10}

6 0

2 years ago

What is 5745 divided by 66

murzikaleks [220]

The answer is 87.0454545

7 0

3 years ago

Read 2 more answers