All categories

3 years ago

Multiply each polynomial (x + 5)(x+4) teach me step by step

Mathematics

1 answer:

lara [203]3 years ago

6 0

Answer: x^2 + 9x + 20

Step-by-step explanation:

Foil Method: (a + b) (c + d) = ac + ad + bc + bd

Lets say:

a = x

b = 5

c = x

d = 4

Plugging in the numbers: xx + 4x + 5x + 5*4

Combine like terms:

xx = x^2

4x + 5x = 9x

5 * 4 = 20

You're then left with: x^2 + 9x + 20

You might be interested in

X ² + x -24=0<br> factor that exact problem to answer a factoring solving problem

Ket [755]

Answer:

Step-by-step explanation:

x²+x-24=0

x²+x+1/4-1/4=24

x^2+x+1/4=1/4+24

$(x+\frac{1}{2})^2=\frac{1}{4}+24=\frac{1+96}{4}=(\frac{\sqrt{97} }{2})^2\\x+\frac{1}{2} =\pm \frac{\sqrt{97} }{2} \\either ~x+\frac{1}{2}=\frac{\sqrt{97} }{2} \\so~x+\frac{1-\sqrt{97}}{2}=0\\ or~x+\frac{1}{2} =-\frac{\sqrt{97} }{2} \\or~x+\frac{1+\sqrt{97}}{2}=0\\ Hence~ x^2-x-24=(x+\frac{1+\sqrt{97} }{2})(x+\frac{1-\sqrt{97} }{2})$

6 0

3 years ago

Which would the phrase "the difference between a number and 2" look like as a variable expression

kompoz [17]

X-2 is the answer. hope this helps!

5 0

4 years ago

Which linear function represents the line given by the point-slope equation y – 2 = 4(x – 3)?

Citrus2011 [14]

Answer:

483/798-5458+7429=19035674846 :))

Step-by-step explanation:

3 0

2 years ago

What value of x will make the equation below true?<br> 14−(x+7)=3

zalisa [80]

14-x-7=3
7-x=3
-x=-4
x=4

7 0

3 years ago

Write down the fifth term and the general term of<br> following sequence : 8,4,2,...

morpeh [17]

Answer:

The terms listed are 8, 4, and 2 in that order. From what we can see, it is a geometric sequence whose next term is gotten by dividing the previous term by 2. The formula for finding the nth term of a geometric sequence is given as $ar^{n-1}$ , where

a = first term which is 8

r = common ratio, 1/2 or 0.5

n = is the term we're looking for, 5

Putting all these together into one solid equation, we have

8 * $0.5^{5-1}$ =

8 * $0.5^{4}$ =

8 * 0.0625 = 0.5

Therefore, the 5th term of the sequence is 0.5. Similar example can be seen here brainly.com/question/9300199

8 0

3 years ago