If 4 < b < 5, then -4 > -b > -5, or -5 < -b < -4.
Then
3 < a < 4 ==> 3 - 5 < a - b < 4 - 4 ==> -2 < a - b < 0
Add 9 to both sides to form a perfect square trinomial:
x² + 6x = 7
x² + 6x + 9 = 16
x² + 2•x•3 + 3² = 16
(x + 3)² = 16
(recall that (a + b)² = a² + 2ab + b²)
Now solve for x. Taking square roots on both sides, we get
x + 3 = ± √16
x + 3 = ± 4
x = -3 ± 4
so the two solutions are x = -7 and x = 1.
Answer: 324 squares.
Explanation: If there are 18 rows of 18 squares, then you’d get 324 after counting them. Or you could just multiply 18 by 18.
Answer:
It's blurry..
Step-by-step explanation:
Do you mind either taking a clearer picture or typing it out in the comment section?
Answer:
C
Step-by-step explanation:
