Find the roots.1) f(x) = - x^2 + 6x + 272) f(x) = 3x^2 + 17x - 20
1 answer:
Answer:
1) x1=-3 and x2=9
2) x1=-20/3 and x2=1
Step-by-step explanation:
We can use the quadratic equation to solve every problem related with quadratic term, that is a equation written as ax^2 + bx +c =0
Remember that the +/- sign means that there are two solutions, one using the + sign and other usign the - sign.
For the first polynomial we have a=-1, b = 6, c=27
Using the quadratic equation we have> x1=-3 and x2=9.
For the second polynomial we have a=3, b=17, c=-20.
Using the quadratic equation we have> x1=-20/3 and x2=1.
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Answer:
The length of BC is 17
Step-by-step explanation:
When we construct a triangle with the data, we will end up a isosceles triangle.
In a isosceles triangle , we know that tow angles and two sides are equal
The questions states that
Then sides AC and AB are also equal
On equation their values
2X - 8 = X+9
2X = X + 9 +8
2X = X + 17
2X - X = 17
X = 17
The length of BC = X = 17
