1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
koban [17]
2 years ago
10

Help please Factorise x²-x-56 its due in 4 minutes

Mathematics
2 answers:
Iteru [2.4K]2 years ago
7 0

Answer:

(x-8)(x+7)

Step-by-step explanation:

using quadratic formula we have

x=  \frac{-b+-\sqrt{b^{2}-4*a*c}}{2*a}

we have:

x^2-x-56=0

a= 1 b=-1 c=-56

so we have:

x=(-(-1)+-sqrt(1^1-4*(1)*(-56)))/(2*1)

x=1+-sqrt(1-4*(-56))/(2)

x=(1+-sqrt(225))/2

x=(1+-15)/2

so we have the roots:

x1=(1+15)/2 =8

x2=(1-15)/2=-7

so the answer is (x-8)(x+7)

Art [367]2 years ago
4 0

x^2-x-56

Think of two numbers that will equal to -x and -56.

Use the 7 and 8 times table.

(x-8)(x+7)

Because - negative number * + positive number= - negative number

(x-8)(x+7)= 0

x-8= 0

Move -8 to the other side. Sign changes from -8 to +8.

x-8+8= 0+8

x= 8

x+7= 0

Move +7 to the other side. Sign changes from +7 to -7.

x+7-7= 0-7

x= -7

Answers:

x= 8 , x= -7

You might be interested in
A test for marijuana usage was tried on 200200 subjects who did not use marijuana. the test result was wrong 77 times.
Alexxandr [17]
400,246 ( 200,200-77=200,123 divide by .5= 400,246
5 0
3 years ago
Whats an equation of a line thwt passes through the points (5,2) and (3,2)
Otrada [13]
2-2=0
5-3=2

so the answer is o over 2 aka 0/2
7 0
3 years ago
How many sides does a quadrillateral have
masya89 [10]

Answer: 4

Step-by-step explanation:In geometry a quadrilateral is a four-sided polygon, having four edges and four corners. The word is derived from the Latin words quadri, a variant of four, and latus, meaning side

3 0
2 years ago
At a mortgage company, 60% of calls are answered by an attendant. The remaining 40% of callers leave their phone numbers. Of the
ludmilkaskok [199]

Answer:

  24/35, about 69%

Step-by-step explanation:

The data given can be put into a 2-way table (attached). It shows that 0.48 of all calls were answered and resulted in a mortgage application. Altogether, 0.70 of all calls resulted in a mortgage application. Thus the conditional probability of interest is ...

  p(spoke to attendant | applied for a mortgage) = p(spoke & applied)/p(applied)

  = 0.48/0.70 = 24/35 ≈ 69%

7 0
2 years ago
How can I solve the Jose moped question because I am confused?
lana [24]

Answer:

BRuh just send jose to the cleaners

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • Which ordered pair is a solution of the equation y+5=2(x+1)
    15·1 answer
  • Find an equation of the circle whose diameter has endpoints , 6−2 and , −4−4 .
    14·1 answer
  • Can someone answer this? Thanks :)
    13·1 answer
  • The slope in decimal form ? ​
    5·2 answers
  • Write and solve a real-word word problem in which there are 3 tables for every 8 chairs
    8·1 answer
  • The table of values represents a linear function g(x), where x is the number of days that have passed and g(x) is the balance in
    5·1 answer
  • Find the total number of outcomes, rolling a number cube and tossing<br> two coins
    14·1 answer
  • What is 1/4 of 5/6???
    13·1 answer
  • Starting at sea level, a submarine descended at a constant rate to a depth of −3/4 mile relative to sea level in 5/8 minutes.
    8·1 answer
  • Solve this pls<br> -5x - 10 = 10
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!