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
likoan [24]
3 years ago
15

X^2 -25 =0. Factor and use the zero product property to solve.

Mathematics
2 answers:
Gwar [14]3 years ago
7 0
X^2 - 25 is a difference of squares which has a special factorization.

In general, a^2 - b^2 = (a + b)(a - b)

x^2 - 25 = 0

(x + 5)(x - 5) = 0

x + 5 = 0  or   x - 5 = 0

x = -5   or   x = 5
galina1969 [7]3 years ago
7 0
Ax^2 + bx + c = 0

a = 1, b = 0, c = -25

Quadratic formula:
x = {-b +/- sqrt(b^2 - 4ac)} / 2a

x = {0 +/- sqrt(0 - 4(1)(-25))} / 2(1)

x = +/- sqrt(100) / 2

x = +/- 10/2

x = +/- 5

Factored: (x - 5)(x + 5)
Solutions: 5 and -5
You might be interested in
Factorise 9x squared -6x+1
kirza4 [7]
What are the answer choices?
5 0
3 years ago
Question 3.<br> How do you write 4% as a decimal?<br> A) 0.4<br> B) 0.40<br> C) 0.04
AnnyKZ [126]
C. 0.04 would be the correct answer.
5 0
3 years ago
Read 2 more answers
A publisher requires 2⁄3 of a page of advertisements for every 5 pages in a magazine. If a magazine has 98 pages, to the nearest
rjkz [21]

Let x be the number of pages of advertisements.

Write a proportion from the table:

\dfrac{2}{3} of a page of advertisment - 5 pages in a magazine

x pages of advertisment - 98 pages in a magazine,

then

\dfrac{\dfrac{2}{3}}{x}=\dfrac{5}{98}.

Find x:

x=\dfrac{\dfrac{2}{3}\cdot 98}{5}=\dfrac{196}{15}=13\dfrac{1}{13}.

Answer: 13 whole pages and \dfrac{1}{13} of 14th page are advertisments, so 14 pages contain advertisments.

3 0
3 years ago
Freemont Run Club surveyed a random sample of 303030 of their members about their running habits. Of the members surveyed, 999 s
devlian [24]

Answer:

the answer is 25 according to Khan

Step-by-step explanation:

3 0
2 years ago
Simplify the following<br>(4x + 3) (5x + 2) ​
lidiya [134]

Answer:

20x^2+23x+6

Step-by-step explanation:

(4x+3)(5x+2)

(4x)(5x)+2(4x)+(5x)3+3(2)

20x^2+8x+15x+6

20x^2+23x+6

Hope that helps :)

8 0
2 years ago
Read 2 more answers
Other questions:
  • Solve the equations using the quadratic formula.<br><br> x^2 - 4x + 3 = 0<br><br> x^2 + 10x = -25
    7·1 answer
  • Braden bought 18 pencils for $4.50.
    14·2 answers
  • Write as a monomial in standard form (−4x^2ya^3)^2
    15·2 answers
  • Janet is flying a kite on a string that is 75m long. The kite is 62m above the ground. Estimate the distance between Janet and t
    12·1 answer
  • if the measure of an angle is 30 degrees more than the measure of its supplement, what is the measure of each angle?
    5·1 answer
  • Part B With which club did Bruce hit the shortest distance? What was the distance in feet?
    8·1 answer
  • How many three number codes does a combination lock with 40 numbers have if the numbers can repeat?
    12·1 answer
  • The lengths of two sides of a triangle are shown. Side 1: 3x2 − 4x − 1 Side 2: 4x − x2 5 The perimeter of the triangle is 5x3 −
    7·1 answer
  • What is the scale factor???
    9·1 answer
  • Find the value of <br> x<br> y, and <br> z in the parallelogram below.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!