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
6.02 x 10^25 ..........................................................
-9.2(8x - 4) + 0.7(2 + 6.3x)....distribute thru the parenthesis
-73.6x + 36.8 + 1.4 + 4.41x ...combine like terms
(-73.6x + 4.41x) + (36.8 + 1.4) =
-69.19 + 38.2 <====
Answer:
A. x is less than or equal to 1 OR x is greater than or more than 2