Question

(x + 3) (x - 3) = 27
quadratic equation ? ​

Answer 1

Answer:

(x^2-9)=27

Step-by-step explanation:

by formula

(a+b)*(a-b)=a^2-b^2

so,x^2-3^2=27

====>x^2-9=27

if we want root

x^2=36

so finally x=+-6 is the root

Answer 2

Step-by-step explanation:

$according \: to \: identity \: \\ a {}^{2} - b {}^{2} = (a + b)(a - b)\\ x {}^{2} - 9 = 27 \\ {x}^{2} = 27 + 9 \\ x {}^{2} = 36 \\ x = \sqrt{36} \\ x = 6$

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