3x^2 - 18x + 15
3x^2 - 18x = -15...divide by 3
x^2 - 6x = - 5...take half of -6, and square it...and add to both sides
x^2 - 6x + 9 = -5 + 9
x^2 - 6x + 9 = 4
(x - 3)^2 = 4
x - 3 = (+-) sqrt 4
x - 3 = (+-) 2
x = 3 (+-) 2
x = 3 + 2 = 5
x = 3 - 2 = 1
so x = 5 and x = 1
Answer:
34 - 13k
Step-by-step explanation:
Answer: 7x + 13/4
Step-by-step explanation:
There you go
5x +y = 6
5x + 3y = -4
multiply top equation by -1 and bottom by 1
-5x -y = -6
5x+3y = -4
solve and get
2y = -10
y = -10/2
y = -5
answer is -5
Answer:
5.89E+12
Step-by-step explanation:
