Question

(x+4)^2-(x-5)^2=9 solve it​

Answer 1

Answer:

we know a²-b² = (a+b)(a-b)

here a = x+4, b = x-5

=>  (x+4+x-5)(x+4-x+5) = 9

=> (2x-1)(9) = 9

=> 2x-1=1

=>2x=2

=> x=1

Step-by-step explanation:

Answer 2

Answer:

${(x + 4)}^{2} - {(x - 5)}^{2} = 9 \\ {x}^{2} + 16 - {x}^{2} + 25 = 9 \\ 41 = 9$

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