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
agasfer [191]
3 years ago
14

Solve x

Mathematics
1 answer:
d1i1m1o1n [39]3 years ago
7 0

Step-by-step explanation:

x^{2} - 4x - 7 = 0

First, let's move the 7 to the right-hand side so we can determine what constant we'll need on the left-hand side to complete the square:

x^{2} - 4x = 7

From here, since the coefficient of the x term is -4, we know the square will be (x - 2) (since -2 it's half of -4).

To complete this square, we will need to add (-2)^{2} to both sides of the equation:

x^{2} - 4x + (-2)^2 = 7 + ^{-2}

x^{2} - 4x + 4 = 7 + 4

(x - 2)^{2} = 11

Now we can take the square root of both sides to figure out the solutions to x:

x - 2 = \pm \sqrt{11}

x = 2 \pm \sqrt{11}

You might be interested in
A grocery store sells snacks by weight. A 6-oz bag of gummy worms costs $3.60. How much would it cost for a 2-oz bag?
Whitepunk [10]

Answer:

$1.20

Step-by-step explanation:

3 0
3 years ago
Which relation is a function?
Alja [10]

Answer:

Bottom right

Step-by-step explanation:

Each domain value can only have 1 range value.

8 0
3 years ago
Find an equation for the line that passes through the given point and satisfies the given conditions. 11) 11) p = ( 9 , 2 ); per
geniusboy [140]

You can use the direction vector as the coefficients of x and y for a line through (0, 0) perpendicular to that direction: x + y = 0. (A common factor of 4 can be removed from the coefficients.)

Translating the line up 2 and right 9, so it goes through the given point, we get ...

... (x -9) +(y -2) = 0

or

... x + y = 11

5 0
3 years ago
what is 5 4/5 simplified I need helppppppppppppppp
nydimaria [60]

u can not simplefly  it doyyyyyyyyyy
6 0
3 years ago
Read 2 more answers
Alex bought six books priced at $8 each. He got a discount of 20% off the total cost. How much did Alex pay for the books? Write
Yanka [14]
6 books at $ 8 = (6 * 8) = 48

if he got a discount of 20%, then he paid 80%
0.80(48) = 38.40 <== what he paid
3 0
3 years ago
Read 2 more answers
Other questions:
  • The temperature at 5:00AM this morning was 25°F. By 8:00AM, the temperature had increased by 40%. What was the temperature at 8:
    13·1 answer
  • Let f(x)=4x+7 and g(x)=3x-5. find (fog)(-4)<br><br> A. -9 <br> B. -61 <br> C. -32 <br> D. -17
    11·1 answer
  • Whats 1/19x2/19 plsplsplsplsplsplsplsplsplsplspls help me i need help
    15·1 answer
  • barbra has two cherry pies.She cuts each pie into quarters.How many slices of cherry pie does barbra have
    6·1 answer
  • Please help-help-help
    12·1 answer
  • PLEASE HELP... WILL GIVE BRAINLIEST
    14·2 answers
  • If the polynomial p(X)=x⁴-2x³+x²-1 is divided by (X+1), then the degree of quotient polynomial.
    12·1 answer
  • A 26-foot ladder is placed against a house and reaches the 24-foot roof. If you want to find the distance between the base of th
    15·1 answer
  • What 2 numbers multiply to make -30 and combine to make -7? ____and____<br> Help PLEASEE
    6·2 answers
  • A day care center charges 60$ per week for one child, plus 20$ per sibling. The equation that describes the total charge t for t
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!