Question

solve it's ( 9+x) *(9-x) *17

Answer 1

Hola!!❤

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⏩( a + b ) ( a - b )= ( 9 + x ) ( 9 - x )

⏩a^2 - b^2 = 9^2 - x^2

➡(9^2 - x^2) * 17

➡(81 - x^2) * 17

➡ - 17x^2 + 1377

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Answer 2

Hey dear friend

(9+x)(9-x)*17

[By identity (a+b)(a-b)=(a²-b²)]

(9²-x²)17
(81-x²)17
1377-17x²

if it is equal to zero then,
1377-17x²=0
1377=17x²
1377/17=x²
81=x²
x=✓81
x= +9,-9

perfectly fine pure correct answer
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