Question

Factorise :9-a^2+2ab-b^2

Answer 1

9+(a^2-2ab+b^2) ---》9+[(a+b)^2]--》.hope it helps u

Answer 2

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9 - a^2 + 2ab - b^2

= 9 - ( a - b ) ^2

= 3^2 - ( a - b )^2

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

= ( 3 - a - b ) ( 3 + a - b )

Ans. =) ( 3 - a - b ) ( 3 + a - b ) ✔

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