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aliay6857
07.06.2020 •
Mathematics
(2x + 5)(2x - 5)
find the product
Solved
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Ответ:
4x^2 -25
Step-by-step explanation:
(2x + 5)(2x - 5)
FOIL
first: 2x*2x = 4x^2
outer : 2x*-5 = -10x
inner : 5*2x = 10x
last: -5*5 = -25
Add them together
4x^2 -10x +10x -25
Combine terms
4x^2 -25
Ответ:
4x²- 25
Step-by-step explanation:
Let's use the FOIL (First, Outer, Inner, Last) method to solve:
(2x + 5)(2x - 5)
FOIL
First:
(2x + 5)(2x - 5)
2x(2x)
= 4x²
FOIL
Outer:
(2x + 5)(2x - 5)
2x(-5)
= -10x
FOIL
Inner:
(2x + 5)(2x - 5)
5(2x)
= 10x
FOIL
Last:
(2x + 5)(2x - 5)
(5)(-5)
= -25
Let's put it all together:
4x² - 10x + 10x - 25
Combine like terms:
4x² - 10x + 10x - 25
4x²- 25
Therefore, the product is 4x²- 25.
Ответ:
Sample Response: The equation of Relationship 1 is y = 3/2x + 5. Substitute 50 for y and solve to find that x = 30. Multiply 30 by 5/6, the rate of change of Relationship 2, to get 25. This means that the initial value would need to be 25 to get to 50 when the input is 30.