Question

Hallar el valor numerico de las siguientes expresiones
algebraica.
ayudenme porfavor

Answer 1

Respuesta:

1._

a)

4a+8b-c

4(3)+8(-2)-2

12-16-2

-6

b)

5a^2-10b+5c

5(3)^2-10(-2)+5(2)

5×9+20+10

45+20+10

75

C)

3a^2+2ab-6b^2

3(3)^2+2(3)(-2)-6(-2)^2

3×9-12-6x4

27-12-24

-9

D)

5a+7b-6c

5(3)+7(-2)-6(2)

15-14-12

-11

E)

-4a^2-8b^2+3c^2

-4(3)^2-8(-2)^2+3(2)^2

-4×9-8×4+3×4

-36-32+12

-56

2._

A)

2x^2+3xy-5z

2(2)^2+3(2)(-3)-5(1)

2×4-36-5

8-36-5

-33

B)

3x+8y+9z

3(2)+8(-3)+9(1)

6-24+9

-9

C)

5x^2-8xy-y^2-7z

5(2)^2-8(2)(-3)-(-3)^2-7(1)

5×4+48-9-7

20+48-9-7

52

D)

6x+2y-z

6(2)+2(-3)-1

12-6-1

5

E)

2xy-y^2-3x^2+8z

2(2)(-3)-(-3)^2-3(2)^2+8(1)

-12-9-3×4+8

-12-9-12+8

-25

Answer 2

Respuesta:

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