Answer:
See Explanation
Step-by-step explanation:
X = 36/5
Or x = 7.2
21 + x = 6x - 15
21 = 6x - 15 - x
21 = 5x - 15
21 + 15 = 5x
36 = 5x
36/5 = x
This is relatively easy because that 25 is a perfect square, whose (square) roots are 5 and -5. x^2-10x+25 = (x - 5)(x - 5). Note how (-5)(-5) = +25, and how -5x - 5x = -10x.
The roots are { (x-5), (x-5) }.
6, 1.5, 10, 16, 80, and 2
ANSWER:
45, 912 = 4.5912 × 10^-4
Hope this helps! :)
Have a lovely day! <3
