Question

x = 2 us a root of the equation x^2 - 4x + a= 9 then a =
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Answer 1

Step-by-step explanation:

since x =2

x² - 4x + a = 2² - 4(2) + a

= 4 - 8 + a

-4 + a = 9

a = 9 + 4 = 13

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Answer 2

Answer:

13

Step-by-step explanation:

$x^{2} - 4x + a = 9$

x = 2

Therefore,

$2^{2} - 4 \times 2 + a = 9$

$4 - 8 + a = 9$

$- 4 + a = 9$

$a = 9 + 4$

$a = 13$

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