help me plz i will give mark brillent
Answers
I know third one
3) x² + 2 + 1/x²
= (x + 1/x)²
I will try second one
2) a² - 27a²b³
a² (1-27b³)
a² (1³ - (3b)³)
a² [ (a-b)(a² + ab +b²)]
a²(a-b)(a²+ ab + b²)
1st one if I can change sign then i can answer
a - b - a³ + b³ or a - b + a³ - b³ or a + b + a³ + b³
First one i answered here.
= (a - b) - (a³ - b³)
= (a - b) - [(a - b)(a² + ab + b²)]
(a-b) (1 - a² + ab + b²)
If I will try your first question I will be suck by half
1) a - b + a³ + b³
(a - b) + [(a + b) (a² - ab + b²)]
One is a - b and another is a + b. Now we can't complete it. So better you change the sign
Answer:
3) x² + 2 + 1/x²
= (x + 1/x)²
2) a² - 27a²b³
a² (1-27b³)
a² (1³ - (3b)³)
a² [ (a-b)(a² + ab +b²)]
a²(a-b)(a²+ ab + b²)
a - b - a³ + b³ or a - b + a³ - b³ or a + b + a³ + b³
= (a - b) - (a³ - b³)
= (a - b) - [(a - b)(a² + ab + b²)]
(a-b) (1 - a² + ab + b²)
1) a - b + a³ + b³
(a - b) + [(a + b) (a² - ab + b²)]
Step-by-step explanation: