baileyjustine9 baileyjustine9

24-09-2020
Mathematics

contestada

If 2x-1 = 13, evaluate the expression below. -x^2-4x
Explain please.

Respuesta :

alexisbalderas10 alexisbalderas10

24-09-2020

Answer: -77

Step-by-step explanation:

2x - 1 = 13

Add 1 on both sides

2x = 14

x = 7

Substitute x to 7

-(7)^2 -4(7)

Solve

-49 - 28 = -77

Answer Link

daijiain101 daijiain101

24-09-2020

Answer:

-77

Step-by-step explanation:

-x^2-4x to [tex]-7^{2}[/tex]- ( 4 × 7)

-7^2 - ( 4 × 7)

-49 - ( 4 × 7)

-49 -28

=

-77

Answer Link

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