A garden is 30 feet long. A row of beans is planted every 15 inches. How many rows of beans are in the garden?
1 answer:
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Answer: 9
Step-by-step explanation:
Given
The function is
To make it a perfect square, compare it with
Here,
So, c must be square of b i.e. 9
Therefore, value of c is 9.
No because it would be
if you knew that
ax^2+bx+c was a trinomial square, then the factored form would be
or 
so
if w^2-9w+81 is perfect square, factored form is either
or 
aka 
or 
expand them
(x+9)^2=x^2+18x+81, wron middle term
(x-9)^2=x^2-18x+81 wrong
so it is not
if you knew that
ax^2+bx+c was a trinomial square, then the factored form would be
so
if w^2-9w+81 is perfect square, factored form is either
expand them
(x+9)^2=x^2+18x+81, wron middle term
(x-9)^2=x^2-18x+81 wrong
so it is not