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03-07-2020
Mathematics

contestada

Which of the following are solutions to the quadratic equation below?
Check all that apply.
X^2+ 8x=9
A. -3
B. 1
C. -9
D. -1
E. 3

Respuesta :

Alfpfeu Alfpfeu

03-07-2020

Answer:

1 and -9

Step-by-step explanation:

[tex]x^2+8x-9=0\\<=> x^2-x+9x-9=0\\<=> x(x-1)+9(x-1)=0\\<=> (x+9)(x-1)=0\\<=> x = -9 \ \ or \ \ x =1\\[/tex]

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