Answer:
16x² - 49
Explanation:
To answer this question, we will multiply each term from the first bracket by each term from the second bracket and then combine like terms to get the final expression.
This can be done as follows:
(4x - 7)(4x + 7)
4x(4x) + 4x(7) - 7(4x) - 7(7)
16x² + 28x - 28x - 49
16x² - 49
Another easier way to solve this is to note that the given brackets can be solved using the difference between two squares.
The rule can be stated as follows:
(a + b)(a - b) = a² - b²
Comparing this to the given brackets, we will find that:
(4x + 7)(4x - 7) = (4x)² - (7)² = 16x² - 49
Hope this helps :)
Answer:
The answer is d) 480cm³
Step-by-step explanation:
3 x 10 x 16 = 480cm³
Answer:
x = 4.54 , − 1.54
Step-by-step explanation:
Answer:
The draw in the attached figure
Step-by-step explanation:
we know that
An office building has the shape of a right rectangular prism with a width 20 meters. length 40, height 60
so
The shape of one floor of the building is equal to the shape of the rectangular base of the prism
therefore
One floor of the building is a rectangle with
Length 40 m
Width 20 m
see the attached figure
