Answer:
(-7 ±
√(-23)) / 4
Step-by-step explanation:
Unless you have to show your work, you don't really have to use the quadratic formula unless it is unfactorable.
2x² + 9 = -7x (Add 7x to both sides)
2x² + 7x + 9 = 0 ( The quadratic formula is (-b ± √(b^2 - 4ac))/2a )
A = 2
B = 7
C = 9
(-7 ± √(49 - 72))/4
= (-7 ± √(-23))/4 (Which simplifies to an imaginary answer, proving that this is, indeed, unfactorable)
= (-7 ±
√(-23))/4
Estimate is 30 × 80 = 2400
6.2x4.3= 26.66; Add that to 7.6= 34.26; then simplify
Answer:
The translation is 3 units left and 2 units down
Step-by-step explanation:
we know that
Point A is located at (1,5) and point A’ is located at (-2,3)
so
The rule of the translation is
(x,y) -----> (x+a,y+b)
(1,5) ----> (-2,3)
Find the values of a and b
1+a=-2 ----> a=-2-1 ----> a=-3
5+b=3 ----> b=3-5 ----> b=-2
so
The rule of the translation is
(x,y) -----> (x-3,y-2)
That means -----> The translation is 3 units left and 2 units down