Answer:
x = 10/3
x = -3
Step-by-step explanation:
3x² - x = 30
3x² - x - 30 = 0
multiply 3 and -30 which =
-90
what are 2 numbers that when multiplied make
-90
and that when added make
-1
(-1 is the number in -x in the equation)
they are the numbers 9 and 10
namely -10 and +9
3(x-10/3)(x+9/3)=0
divide both sides by 3
(x-10/3)(x+9/3)=0
then split factors being multiplied
(x-10/3)=0
(x+9/3)=0
x = 10/3
x = - 9/3 = -3
