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Dafna1 [17]
2 years ago
4

Find an expression which represents the difference when (7x+9y)(7x+9y) is subtracted from (x+5y)(x+5y) in simplest terms.

Mathematics
1 answer:
inna [77]2 years ago
8 0

Answer:

-48x²-116xy-56y² or

-4(12x²+29xy+14y²)

Step-by-step explanation:

A.

(7x+9y)(7x+9y)=

49x²+126xy+81y²

(x+5y)(x+5y)=

x²+10xy + 25y²

subtracted from means

x²+10xy + 25y² goes first

(x²+10xy + 25y²) - (49x²+126xy+81y²)

- (49x²+126xy+81y²) means

-1 times (49x²+126xy+81y²)

-1*(49x²+126xy+81y²) = -49x²-126xy-81y²

x²+10xy+25y²-49x²-126xy-81y²

-48x²-116xy-56y²

or

B.

sometimes its good to use real numbers

use x = 0 y = 1

(9)(9) is subtracted from (5)(5)

81-25=56

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3 years ago
The number of rows in an auditorium can be represented by the function f(x) = 80x. the number of seats in each row can be repres
Dominik [7]

Applying multiplication of functions, the total number of seats in the auditorium is given by:

h(x) = 80x² + 560x.

<h3>How polynomial functions are multiplied?</h3>

They are multiplied applying the distributive property, that is, all the terms are multiplied and then the common terms are added.

In this problem, the functions are given as follows:

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Then the multiplication is:

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More can be learned about multiplication of functions at brainly.com/question/13136492

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4 0
2 years ago
Work out the value of n 1/8 ÷ √ 2 = 2 n Give your answer as an improper fraction
Alex Ar [27]

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8 0
4 years ago
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alexandr1967 [171]

Answer:

x=38

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Step-by-step explanation:

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(5,1) Is Point Form.

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