Answer:
There are no real factors for this.
Step-by-step explanation:
We could answer this either by checking each listed expression to see whether it is a factor of 9r^2-4r+1, or
We could take the coefficients of 9r^2-4r+1, determine the quantity b²-4ac (called the 'discriminant') and draw a conclusion based upon whether the discriminant is -, + or 0.
Let's use the 2nd approach.
Here, a = 9, b = -4 and c = 1.
Then the discriminant is b²2 - 4ac, or (-4)² - 4(9)(1), or 16 - 36.
Since 16 - 36 is negative, we conclude that this 9r^2 - 4r + 1 has NO REAL FACTORS.
8 outcomes the other guy is wrong . The coin multiplies it by 2
Answer:
-12x+12y=0
Step-by-step explanation:
<em>the missing term is 5</em>
- <em>Step-by-step explanation:</em>
<em>Hi there ! </em>
<em>12x² - 75 = </em>
<em>= 3(4x² - 25)</em>
<em><u>use formula</u></em><em> a² - b² = (a - b)(a + b)</em>
<em>= 3(2x - 5)(2x + 5)</em>
<em>= 3(2x + 5)(2x - 5) </em>
<em>the missing term is 5</em>
<em>Good luck !</em>
