2(x + 9)
2*x + 2*9
2x + 18 ← answer
For quadratics, these formulas are used mainly for factoring.
Your equation can be written as ...
... 2(x² +2x -3) = 0
You factor this by looking for factors of -3 (c=x1·x2) that add to give +2 (b=-(x1+x2)). These are {-1, +3}, so the factorization is ...
... 2(x -1)(x +3) = 0
The roots are then 1 and -3, which sum to -b = -2.
(You will note that the numbers used in the binomial factors are the opposites of the roots x1 and x2 in the Viete's Formulas. That is how we can look for them to sum to "b", rather than "-b".)
The values gotten for the coordinate plane are;
- The distance between the x-coordinate of R and T is 3.
- The distance between the y-coordinate of R and T is 6.
- R' is (-1, 2) from T, so the coordinates of R' are (2, 0).
<h3>Why the above values?</h3>
The Reason for the obtained value is that since thee rule for the dilation of ΔRST is:
- The vertices of the given triangle are R(0, 4), S(0, -2), T(3, -2)
Then, the distance that exist between the x-coordinate of R and T will be:
3 - 0
= 3
Then the distance between the y-coordinate of R and T will be:
4 - (-2)
= 6
Note that the location of the point R' is said to be relative to point T and as such:
The location of point R'
= (-1 + 3, 2 - 2)
= R'(2, 0)
Hence R' is (-1, 2) from T, and the coordinates of R' is (2, 0)
Therefore, The values gotten for the coordinate plane are;
- The distance between the x-coordinate of R and T is 3.
- The distance between the y-coordinate of R and T is 6.
- R' is (-1, 2) from T, so the coordinates of R' are (2, 0).
Learn more about coordinate plane from
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Answer:
5800
Step-by-step explanation:
that is to the nearest hundred