
so.. check your "c" choices, to see which one gives you a positive discriminant
Answer:
Square root of 21 + 4 = w
Step-by-step explanation:
Answer:
see explanation
Step-by-step explanation:
and
cannot be simplified as they are already in simplest form.
Note that
+
≠ 
Thus
2
+ 5
← cannot be simplified any further
Answer:
The dimension of the plot is 30 yd by 20 yd
Step-by-step explanation:
Given;
Area = 600 yd^2
Length = width + 10
l = w + 10 ......1
Area of a rectangular plot is;
Area A = length × width
A = l × w
Substituting equation 1;
A = (w+10) × w
A = w^2 + 10w
600 = w^2 + 10w
w^2 +10w -600 = 0
Solving the quadratic equation;
w = -30 or 20
cannot be negative
w = 20 yd
l = w+10 = 20+10 = 30yd
The dimension of the plot is 30 yd by 20 yd