Step-by-step explanation:

Answer:
9^2= 81, √25= 5, 21^2= 441, √4= 2, √144= 12, 16^2= 256, √625= 25, (-11)^2=121
Answer:

Step-by-step explanation:
The given quadratic equation is:

Comparing it with the standard form of Quadratic Equation
, we get:
a = 3, b = -9 and c = 1
Discriminant = b² - 4ac
D = (-9)²-4(3)(1)
D = 81 - 12
D = 69
we are given
distance=6.7 furlongs
(a) In rods
we know that

we can multiply both sides by 6.7

..............Answer
(b) In chains
we know that

we can multiply both sides by 6.7

..............Answer