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nickykardashian
21.11.2019 •
Mathematics
Find the x-intercept(s) of f(x)=3x^4−30x^3+75x^2
enter intercept(s) as points
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Ответ:
(0, 0) and (5, 0)
Step-by-step explanation:
f(x) = 3x⁴−30x³+75x²
(a) Factor the polynomial
3x⁴−30x³+75x² = 3x²(x² -10² + 25)
= 3x²(x - 5)²
(b) Solve the polynomial
3x²(x - 5)² = 0
x² = 0 x - 5 = 0
x = 0 x = 5
The x-intercepts are at (0, 0) and (5, 0).
The Figure below shows the graph of your polynomial with the x-intercepts at (0, 0) and (5, 0).
Ответ:
(-3, -129)
Step-by-step explanation:
Given
Two lines:
are perpendicular to each other and intersect at point (-8,3).
To find: (P, Q)
Solution:
The two lines intersect at (-8,3).
It means, the equation of line will be satisfied when we put value of x = -8 and y = 3
Putting in the second equation, we will get an equation in P and Q:
Given that two lines are perpendicular.
It means the product of their slopes will be equal to -1.
i.e.![m_1\times m_2=-1](/tpl/images/0714/4394/491dc.png)
Slope of a line of the form
is given as:
So, slopes of given lines are:
Using the condition:
Putting the value of P in equation (1):
So, answer is (-3, -129)