Ask question

Ask question

All categories

3 years ago

9

Factor the following quadratic expression x^2 + 9x + 20

1 answer:

AysviL [449]3 years ago

6 0

Answer:

(x+5)(x+4)

Step-by-step explanation:

factors of 20: 1,20,2,10,4,5

Since 4 and 5 are the only factors of 20 that have a sum of 9 the answer is (x+5)(x+4)

You might be interested in

2x squared + 9x=-5 i need to solve for x

In-s [12.5K]

$2x^2+ 9x=-5 \\ \\2x^2 + 9x+5 =0 \\\\a=2, \ \ b=9 , \ \ c=5 \\\\\Delta =b^2-4ac = 9^2 -4\cdot 2\cdot 5 = 81-40=41 \\ \\x_{1}=\frac{-b-\sqrt{\Delta} }{2a}=\frac{-9-\sqrt{41}}{2\cdot 2 }=\frac{-9-\sqrt{41}}{ 4 }\\\\ x_{2}=\frac{-b+\sqrt{\Delta} }{2a}=\frac{-9+\sqrt{41}}{2\cdot 2 }=\frac{-9+\sqrt{41}}{4 }$

3 0

3 years ago

Find all the real zeros of <br><br> f(x)=3x^3-9x^2+3x-9 <br><br><br> Can someone help me please

vaieri [72.5K]

Answer:

x=0,3

Step-by-step explanation:

start by dividing every term by 3

x^3-3x^2+x-3

group into 2 terms

(x^3-3x^2)+(x-3)

simplify as much as you can

x^2(x-3)+(x-3)

combine terms

(x^2)(x-3)

x=3, 0

4 0

3 years ago

What is the perimeter of Justin's garden in inches? I can't find the right answer 6 yards and 8 yards its a rectangle garden pls

madreJ [45]

Answer:

28 yards

Step-by-step explanation:

It's perimeter so you add (6x2)+(8x2)

The x2 is because there's 2 of each side

3 0

3 years ago

May I please have help? It would be very much appreciated! see attached file somewhere around this question.

noname [10]

Answer:

Step-by-step explanation:

r = 8 units

Area = (1/4)πr²

$=\frac{1}{4}*3.14*8*8\\\\=3.14*8*2\\\\= 50.24 square units\\$

8 0

3 years ago

Read 2 more answers

A pediatricians office tracks the age (in months) in which 25 babies begin to walk. Use the dot plot at the right to answer the

OLEGan [10]

Answer:

A pediatricians office tracks the age (in months) in which 25 babies begin to walk

3 0

2 years ago

Read 2 more answers