Answer:
b = 80
Step-by-step explanation:
Given that,
x² + bx - 81
To find,
value of b
What is factorable?
A polynomial equation with highest degree 2 is if factorable when
- we can find two terms which when multiples = -81x², <em> ( x² * - 81 = -81x² ) </em>
- and when add = bx
possible factors:
- -1x * 81x = -81x² (Accepted)
- 1x * -81x= -81x² (rejected)
- 9x * -9x = -81x² (rejected)
- -9x * 9x = -81x² (rejected)
Only when -1x , 81x is added -1x + 81x = 80x
so, bx = 80x
b = 80
<h3>The equation is x² + 80x - 81</h3>
Answer:
<h3>
second term minus first term </h3>
Step-by-step explanation:
Difference is a result of subtracting (not dividing!)
To calculate difference between two terms we have to subtract the previous from the next:
Answer:
the answer is c.x-4
Step-by-step explanation:
x^2+x-20
x^2+5x-4x-20
x(x+5)-4(x+5)
(x-4) (x-5)
The reciprocal of any number is just '1' divided by the number. The reciprocal of a fraction is just flip-it-over.
The reciprocal of 11/3 is 3/11 .
It takes Gloria 1/2 an hour to make 1 ornament because 1 ÷ 2 (ornaments) = 1/2.