2 years ago

How to factor 49y^{2}-9x^{2}

Mathematics

1 answer:

lorasvet [3.4K]2 years ago

7 0

Answer:

(7y + 3x)(7y - 3x)

Step-by-step explanation:

a² - b² = (a + b)(a - b)

49y² - 9x² = (7y)² - (3x)² {a = 7y ; b - 3x}

= (7y + 3x)(7y - 3x)

You might be interested in

Li deposited $17,500 into a bank account that earned simple interest each year. After 2 years, he had earned $2975 in interest.

Nimfa-mama [501]

Let x is the interest rate

$17,500 * 2 * x = $2975
$35,000x = $2,975
x = $2,975/$35,000
x = 0.085

0.085 * 100 = 8.5%

Answer: annual interest rate was 8.5%

3 0

2 years ago

Read 2 more answers

Make x the subject of the formula if a/b-x=b/a+x

Alenkinab [10]

Answer:

s the question like that?

Step-by-step explanation:

a- x = b + x .

b. a

6 0

2 years ago

The median number of coloring contests won by 4 kids in a certain year is 5. The range of number of contests won by those kids t

Orlov [11]

True
bcause the median number is 5

7 0

2 years ago

Jim earned $140 during the summer doing chores. He bought 2 sets of pens worth $25 each using his chore money. How much money wa

Degger [83]

Jim has $90 from is chore money left.

6 0

3 years ago

Read 2 more answers

Find the average rate of change of the function below over the interval (-4,-1).

babymother [125]

Answer:

-2

Step-by-step explanation:

$\frac{f(b)-f(a)}{b-a}\\ \\=\frac{f(-1)-f(-4)}{-1-(-4)}\\ \\=\frac{-4-2}{-1+4}\\ \\=\frac{-6}{3}\\ \\=-2$

Therefore, the average rate of change over the interval [-4,-1] is -2.

5 0

2 years ago