Question

Simplifica:
(4x + 5y)(4x - 5y) + (710 x + 6y)(V10 x - 6y)
a. 26x2 - 6172 d. x2 + 63y2
b. 26x2 - 63y
e. 26x2 - y2
c. 26x2 - y2​

Answer 1

Explicación paso a paso:

4x + 6y=64

x + 6y=34

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|4 6|

|A|=|1 6| =(4) (6)-(6)(1)= 24-6=18

|x|=|64 6| =(64) (6)-(6)(34)=384-204=180

|34 6|

x=180/18 =10

|y|=|4 64| =(4) (34)-(64)(1)=136-64=72

|1 34|

y=72/18 = 4

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2x + 4y=30

4x + 5y=39

|A|=|2 4| =(2) (5)-(4)(4)=10-16= - 6

|4 5|

|x|=|30 4| =(30) (5)-(4)(39)=150-156= - 6

|39 5|

x= -6/ -6 = 1

|y|=|2 30| =(2) (39)-(30)(4)=78-120= - 42

|4 39|y= - 42/ -6 =7