-7 is your answer to this equation
Answer:
63
Step-by-step explanation:
Use Pythagorean theorem,
base² + altitude² = hypotenuse²
a² + 9² = 12²
a² = 12² - 9²
a² = 144 - 81
a² = 63
a = √63
114
You will need to multiply L x W and then add them all
x² - 8x + 16 = 0
(x - 4)^2 = 0
x = 4
Answer: One zero, x=4