The correct answer for b^2 - 4ac (also known as the discriminant) should be 57 or answer C.
You first must solve the equation for 0.
<span>1 = 2x2<span> + 7x ---> subtract 1 from each side
</span></span>0 = 2x^2 + 7x - 1
Now we can find a as the coefficient of the x^2 term, b as the coefficient for the x term an c as the number at the end.
a = 2
b = 7
c = -1
Now we can plug these values in for b^2 - 4ac
b^2 -4ac
(7)^2 - 4(2)(-1)
49 + 8
57
Answer:
When x = 3, use -3x -2
-3(3) - 2 = -9 - 2 = - 11
Answer:
(v - 7)(v + 5)
Step-by-step explanation:
Given
v² - 2v - 35
Consider the factors of the constant term ( - 35) which sum to give the coefficient of the v- term ( - 2)
The factors are - 7 and + 5, since
- 7 × 5 = - 35 and - 7 + 5 = - 2, hence
v² - 2v - 35 = (v - 7)(v + 5)
Answer:
1
Step-by-step explanation:
1/(1+p+q^-1)+1/(1+q+r^-1)+1/(1+r+p^-1) = 1.
Answer:
2
Step-by-step explanation:
