Question

factorize 81-(x-7)^2 ​

Answer 1

Answer:

the answer is -x^2 +130

Step-by-step explanation:

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Answer 2

Answer:

(x+2)(x-16) ,

x = -2

x = 16

Step-by-step explanation:

On expanding (x-7)^2

$=>81-(x^2 + 49 - 14x)=0\\\\=>81 - x^2 - 49 +14x\\\\=>32-x^2+14x=0\\\\=>-x^2 + 14x +32 = 0\\\\=>Multiplying~-1~both~sides~we~get:\\\\=>x^2 - 14x - 32\\\\=>On~splitting~middle~term:\\\\=>x^2 - 16x + 2x-32\\\\=>x(x-16)+2(x+16)\\\\=>(x+2)(x-16)\\\\=>x = -2~,~x = 16$

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