Hello,
A cubic polynomial with -2,1,2 as roots is
f(x)=k*(x+2)(x+1)*(x-2)=k(x²-4)(x+1)=k(x^3+x²-4x-4)
Looking the answers ==>k=1
==>Answer A
Answer:
4/15
Step-by-step explanation:
2/3 play sports
2/5 play football
Of the 2/3 that play sports, 2/5 of them play football
2/3(2/5) = 4/15
Step-by-step explanation:
×/21 x ×/21 = 7× x/21
x= 1/3
Answer:
x=31
Step-by-step explanation:
you just have to add the two equations to equal 180 because it's they're supplementary angles.
(25+x)+4x=180
25+x+4x=180
25+5x=180
5x=155
x=31
Answer:
220 possible ways
Step-by-step explanation:
Given
--- people
-- posts 
Required
Determine the number of selection
Since there is no condition attached, the number of selection is:
Substitute values for n and r
Apply combination formula
<em>Hence, there are 220 possible ways</em>
