Answer:
He set the factored expressions equal to each other. instead of setting them equal to zero
Step-by-step explanation:
f(x) = x^2 + 4x + 3. His work is shown below.
0 = x^2 + 4x + 3
0 = (x + 3)(x + 1)
Here is where we use the zero product property
x+3 = 0 x+1 =0 We do not set them equal to each other
Rectangle:
P = 2(L + W)
51.6 = 2 (L + 9.9)
L + 9.9 = 51.6 / 2
L + 9.9 = 25.8
L = 15.9
Answer
The length of the base = 15.9 feet
The answer to this question would be -26
