Subtract 30, then factor the equation.
... x² = 30
... x² - 30 = 0
... (x -√30)(x +√30) = 0
By the zero product rule, the solutions are values of x that make a factor be zero.
... x - √30 = 0 . . . . the first factor is zero
... x = √30
... x + √30 = 0 . . . . the second factor is zero
... x = -√30
The solutions are . . .
... x = ±√30 . . . . . matches your 3rd choice
Answer:
If you keep adding a zero and keep getting the same number again and again. Than what you have is a repeating decimal.
1X+8X=90
9X=90
X=10
so one of them is 10 and the other one is 8 times 10 which become 80
Answer:
400 Dollars
Step-by-step explanation:
It is 400 dollars since 5 yards and 4 yards which are the dimensions of this room is multiplied together, it is 20 and each square yard is 20 dollars which concludes you to multiply 20 by 20 and gives us the answer 400.
