3 years ago

What is x2+2x-8=0 by factoring ?

Mathematics

1 answer:

Vaselesa [24]3 years ago

7 0

Answer:

(x+4)(x-2)

Step-by-step explanation:

We need to find two numbers that multiply to -8 and add up to 2. These are 4,-2.

Rewrite the polynomial:

x^2-2x+4x-8

and factor each pair:

x(x-2)+4(x-2) = (x+4)(x-2)

You might be interested in

What is 2000000 x 40000000

Effectus [21]

<h2>Answer:</h2><h2>8e+13 or 80,000,000,000,000</h2><h2 /><h2>Hope this helps!!</h2>

5 0

3 years ago

How do you solve x 1/2 power + 2

nirvana33 [79]

It probably is 2 1/4 because 1/2 to the second power is 1/4 then added to 2 will be 2 1/4. Hope this helps! Good Luck with your homework!!!

8 0

3 years ago

A store sells towels for 25% off the regular price. The regular price of a beach towel is $24.50. Which expression represents th

garik1379 [7]

The answer is A because 25 percent is equivalent to .25

5 0

3 years ago

Read 2 more answers

Use the quadratic formula to solve x² + 8x + 9 = 0. What are the solutions to the equ ation? Round irrational solutions to the n

IrinaVladis [17]

It has to be d when you do the quadratic equation

3 0

3 years ago

Read 2 more answers

There are infinitely How many pairs of numbers of which the sum of their cube roots is zero give two of these pairs

ivanzaharov [21]

Answer:

Infinite pairs of numbers

1 and -1

8 and -8

Step-by-step explanation:

Let x³ and y³ be any two real numbers. If the sum of their cube roots is zero, then the following must be true:

$\sqrt[3]{x^3}+ \sqrt[3]{y^3}=0\\ \sqrt[3]{x^3}=- \sqrt[3]{y^3}\\x=-y$

Therefore, any pair of numbers with same absolute value but different signs fit the description, which means that there are infinite pairs of possible numbers.

Examples: 1 and -1; 8 and -8; 27 and -27.

8 0

3 years ago