Help me please right now! thank you guys so much
2 answers:
Answer:
C
Step-by-step explanation:
( factorise numerator by factoring out 2x from each term )
12x³ - 14x² - 40x
= 2x(6x² - 7x - 20) ← factor the quadratic
Consider the product of the factors of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term.
product = 6 × - 20 = - 120 and sum = - 7
The factors are - 15 and + 8
Use these factors to split the x- term
6x² - 15x + 8x - 20 ( factor the first/second and third/fourth terms )
= 3x(2x - 5) + 4(2x - 5) ← factor out (2x - 5) from each term
= (2x - 5)(3x + 4)
Then
← cancel the common factor (2x - 5) on numerator/denominator
= 2x(3x + 4) ← distribue
= 6x² + 8x → C
You might be interested in
To solve this problem, we have to apply mole-concept to this and we would need the molar mass of AlCl3. 2g of AlCl3 contains 9.034*10^21 molecules.
<h3>Number of Molecules in 2g of AlCl3</h3>The molar mass of AlCl3 is given as 133.34g/mol
Data;
- mass = 2g
- molar mass = 133.34g/mol
Using the mole concept, we can equate the molar mass to the number of molecules present in the entity.
If we equate this
From the calculations above, 2g of AlCl3 contains 9.034*10^21 molecules.
Learn more on mole concept here;
#SPJ1