16x2y2 + 9z2, a perfect square trinomial
16x2y2 – 24xyz + 9z2, the difference of squares
16x2y2 – 24xyz + 9z2, a perfect square trinomial
Answer:
Step-by-step explanation:
Given expression has exponent 2, so we multiply it twice
Apply FOIL method to multiply the parenthesis
multiply 4xy inside the second parenthesis
and multiply -3z inside the second parenthesis
Combine like terms
If squaredeck has an area of 81 square feet then each side of the square deck is 9 feet long.
The area of Rectangle is length times of width.
The area of a square is given by the formula A = s²
where A is the area and s is the length of each side.
In this case, we are given that the area of the deck is 81 square feet, so we can plug that into the formula:
81 = s²
To solve for s
we can take the square root of both sides:
√81 = √s²
9 = s
Therefore, each side of the square deck is 9 feet long.
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All 4 sides of a square are of the same length.
The formula for the area of a square is s*s = area where s is the length of one side of the square.
s^2 = 81
s = 9 or -9
-9 does not apply here but 9 does.
Each side of the square deck is 9 feet long.
(b.) Reginaldo had $17 in his account and for every book he buys, it costs him $4.
(c.) Sydney has collected 8 postcards. Each time a friend comes to visit, Sydney gives her a postcard.
(d.) Owen has 3 pets. He receives a new pet each time he has a birthday.