x is just a stand-in for an unknown/variable number, so we could use phrases like "a number," "a value," "an unknown," etc. Here, I'll use "a number." We can verbally refer to the result of subtraction as "the difference" as well, so we can write x - 6 in English as "The difference of a number and 6."
Answer:
9x² - 49
Step-by-step explanation:
A difference of squares factors in general as
a² - b² = (a + b)(a - b)
Given (3x + 7) with a = 3x and b = 7
Then the other factor is (3x - 7)
(3x + 7)(3x - 7)
= (3x)² - 7²
= 9x² - 49
Answer:
ALEX
Step-by-step explanation:
Because if u look it says ten minutes an e has 220 so that equals to almost 3'500 dollars Im only in 7th grade good luck
Answer:
Distribute the 3 to the parenthesis, and the -1 to the parenthesis.
This will result to:
3x-9-x+4
2x-5
Answer:
Step-by-step explanation:
Given expression is ,
This would be simplified using the law of exponents , some of which I will use here are ,
Using the above laws ,
![\sf \longrightarrow \bigg[ \dfrac{2}{8} \bigg(\dfrac{x^3}{x^{-2}}\bigg)\bigg(\dfrac{y^{-5}}{y^6}\bigg)\bigg(\dfrac{z^8}{z^3}\bigg) \bigg]^{-2}](https://tex.z-dn.net/?f=%5Csf%20%5Clongrightarrow%20%5Cbigg%5B%20%5Cdfrac%7B2%7D%7B8%7D%20%5Cbigg%28%5Cdfrac%7Bx%5E3%7D%7Bx%5E%7B-2%7D%7D%5Cbigg%29%5Cbigg%28%5Cdfrac%7By%5E%7B-5%7D%7D%7By%5E6%7D%5Cbigg%29%5Cbigg%28%5Cdfrac%7Bz%5E8%7D%7Bz%5E3%7D%5Cbigg%29%20%20%5Cbigg%5D%5E%7B-2%7D)
Using the second law mentioned above , we have,
![\sf \longrightarrow \bigg[ \dfrac{1}{4}(x^{3+2})(y^{-5-6})(z^{8-3})\bigg]^{-2}](https://tex.z-dn.net/?f=%5Csf%20%5Clongrightarrow%20%5Cbigg%5B%20%5Cdfrac%7B1%7D%7B4%7D%28x%5E%7B3%2B2%7D%29%28y%5E%7B-5-6%7D%29%28z%5E%7B8-3%7D%29%5Cbigg%5D%5E%7B-2%7D%20)
Simplify ,
![\sf \longrightarrow \bigg[\dfrac{1}{4} x^5y^{-11}z^5\bigg]^{-2}](https://tex.z-dn.net/?f=%5Csf%20%5Clongrightarrow%20%5Cbigg%5B%5Cdfrac%7B1%7D%7B4%7D%20x%5E5y%5E%7B-11%7Dz%5E5%5Cbigg%5D%5E%7B-2%7D%20)
Using the first law mentioned above , we have,
![\sf \longrightarrow \bigg[ \dfrac{1}{4^{-2}} x^{5(-2)} y^{-11(-2)} z^{5(-2)}\bigg]](https://tex.z-dn.net/?f=%5Csf%20%5Clongrightarrow%20%5Cbigg%5B%20%5Cdfrac%7B1%7D%7B4%5E%7B-2%7D%7D%20x%5E%7B5%28-2%29%7D%20y%5E%7B-11%28-2%29%7D%20z%5E%7B5%28-2%29%7D%5Cbigg%5D%20)
Simplify,
Finally using the fourth law mentioned above , we have ,
<h3>
Option K is the correct answer.</h3>
