Recognize the difference of 2 perfect squares
remember
a²-b²=(a+b)(a-b)
9y⁴=(3y²)²
1=1²
9y⁴-1=(3y²)²-(1)²=(3y²+1)(3y²-1)
if we wanted to force a factor again
(3y²+1)(y√3+1)(y√3-1)
Answer:
A.
Step-by-step explanation:
3 is a common multiple .. (3x4=12....3x5=15)
Answer: true
Step-by-step explanation:
Step-by-step explanation:
Suppose AB is the 3- foot high access ramp that ends at point C 20 feet along the ground and
theta is the angle of depression from the start of 3 foot high ramp at point A
Now, in ∆ ABC
m<ACB= theta ( alternate interior angle)
Therefore,
(theta) = tan⁻¹(3/20)
= 8.5°