Split it up
3x^2+12x-5x-20
group
(3x^2+12x)+(-5x-20)
factor
(3x)(x+4)+(-5)(x+4)
undistribute (x+4) like ab+ac=a(b+c)
(3x-5)(x+4)
The anwser is 10,000 drops 1000 multiplied by 10 gives you the anwser
Formula:
x + 2(x+1) = 17
x + 2x + 2 = 17
3x + 2 = 17
3x = 15
x = 5
So, the answer is 5 and 6
Hope this helped!
If you do a check (plug in your answer to y) that would be your reason
Easy you just divide it like a regular then put move the decimal to the left the number of times letters are behind it.
